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Product Data Sheet. GTX 10W-40. Superior Protection Against Deposits*. Description. Castrol® GTX® is one of the most trusted engine oils in the world. Castrol GTX 10W-40 uses modern additive technology to provide superior protection against harmful deposits in the engine. Application. Exceeds engine manufacturer s warranty requirements for ...detergent ppm/zinc ppm ratio = 1.9 7. 20W50 Castrol GTX, API SN (conventional) 91,165 psi "load carrying capacity" (15% below no. 1) zinc = 610 ppm total detergent = 2599 ppm ... So, it's quite clear by looking at these results, that high zinc levels, high detergent levels, and heavy viscosities do NOT play any particular roll in how well ...Here is the most popular Valvoline motor oil with Zinc you can go for: Valvoline VR1 Racing SAE 10W-30 High Zinc Motor Oil. Valvoline VR1 Racing SAE 20W-50 High Zinc Motor Oil. If you want to know more about the composition of the Zinc and other elements in the Valvoline VR1 racing oil, I have a separate guide on it.Join us as we dive into the 10 longest nonstop flights in the world by distance and flight times from a points and aircraft perspective. We may be compensated when you click on pro...What are the benefits of Castrol EDGE Euro Car? #1 Brand among European Auto Professionals and Technicians*. Exceeds the test limits of OEM specifications. Formulated to provide unsurpassed wear protection, reduced friction and deposit control to maximize performance. Broad range of products that cover all the relevant European specifications.There are likely applications for the 20W50 oil as nthach said: aircooled buggies and v twins. And some loosely built forged piston, chromed ringed Big Blocks. And older VW/Porsche boxer engines. Mercedes engines of the 1960s-1990s also enjoyed thicker oil, though Delo was my pick for those.The cam and tappets should be run-in by 250 to 500 km. Also ZDDP is temperature activated so running the engine at low oil temperature also accelerates cam and tappet wear. If a full synthetic engine oil is preferred then our Castrol Edge 0W-40 or Edge Sport 10W-60 is recommended.This item: Castrol Edge High Mileage 20W-50 Advanced Full Synthetic Motor Oil, 1 Quart, Pack of 6 $40.08 $ 40 . 08 ($0.21/Fl Oz) Get it as soon as Monday, Jun 3Get the best Castrol engine oil products at the right price. Order online or pickup at your local AutoZone Auto Parts store. ... 20W-50 (3) Container Size. 1qt (24) 5qt (21) 1 (1) Rating ... Castrol High Mileage Full Synthetic Engine Oil 10W-30 1 Quart. Sponsored. Castrol High Mileage Full Synthetic Engine Oil 10W-30 1 Quart $ 11 99. Part # 15D541.Provide superior protection from high temperature carbon deposits, enabling the engine to retain its performance for longer ... CASTROL ® ACTEVO ® 20W-50 MEETS OR EXCEEDS INDUSTRY STANDARDS: API SL; JASO MA-2; Available in the following grades: 10W-40 20W-50 10W-40 Castrol ® ACTEVo ® 10W-40 ...Castrol GTX Classic 20W-50 Conventional Motor Oil, 1 Quart. Key Features: Specialized additives containing high Zinc and Phosphorus for extreme wear protection; Formulated …Flat tappet camshafts with elevated valve spring pressures need Zinc as a sacrificial additive. Most '60s cars can just use a good 10w30. I have used Shell Rotella T 15w40 in my Vette and Oldsey, but I understand the good stuff is no longer available. Both have pretty stock valve trains.Castrol GTX Classic 20W50 Conventional Engine Oil 5 Litre Jug.For Series 1 to 3, 1.6L, 2.0L, 2.25L, 2.6L Gas and Diesel Engines.Castrol® GTX® Classic is a high performance formula for push-rod, flat tappet engines and performance cam applications. It’s blended with high zinc and phosphorus content to help prevent premaI am using Amsoil 4T 20W50 for the last 2 oil change in my 15 GSA. So far , it seems to be the best oil for the GSA. Smoother shifting thru the gears ,less noisy from the engine and it suits the hot weather where I am from.I had used a few others oils like Mobil 1 Racing 4T 10W40 , Motul 300V 15W50 , Motul 7100 10W50.High Zinc Anti-Wear Protection. Protection for Bearings & Journals. zMAX 20w50 Racing Oil is specifically engineered for extreme racing applications. It provides reduced drag for increased horsepower and torque while standing up to higher temperatures with less metal fatigue. Compatible with high-octane gasoline, methanol and NOx fueled engines ...Castrol Classic XL 20W-50 is a conventional multigrade engine oil of good all round performance, formulated with high quality mineral oils plus selected additives, ideally suited to older technology and classic car engines. Castrol Classic XL 20W-50 is designed to meet the motor manufacturers' requirements for passenger cars andCastrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 1 Quart. Best seller. Add. Sponsored. $6.48. current price $6.48. ... Castrol GTX 20W-50 Conventional Motor Oil, 5 Quarts Key Features: Superior protection against engine sludge* Advanced protection against viscosity and thermal breakdown;Castrol GTX now comes in both modern API SP rated and Classic API SJ rated formulas. Which one should you use? In this video we dig into the formulas differe...Specs. Type: Synthetic Rating: 20W-50 Size: 1 quart Pros. Works great at hot temperatures; Delivers good quality and good performance; Best suited for four-stroke V-twin enginesZinc and phosphorus additives are high in all Valvoline 20W-50 and 10W-30 motor oil. Thus, these oils are suitable for racing cars, off-road vehicles, flat tappet engines, and all high-performance vehicles. ... After pouring Castrol zinc-based motor oil, you will experience the optimal performance from your car engine. 9. Redline.Find the best motor oil for your car with Castrol's variety of high-quality motor oils, lubricants, and more. With industry-leading engine oils like Castrol GTX, Castrol EDGE, and Euro Car, you can discover the best Castrol oil selection at O'Reilly Auto Parts®. Shop online or at an O'Reilly store near you to get everything you need to ...With over 42 years in business, our team are here to help you rebuild, restore, and maintain your car. Order your Engine Oil Classic XL (20w-50) 4.55 Litres (1 gallon) - RX1363 - Castrol ⛽ Low prices and fast, worldwide delivery British car experts ♚ Call ☎ 01522 568000 or ☎ 1-855-746-2767.Joined: May 12, 2012. Oddometer: 2,614. Location: VA. The BMW MOA (actually, the forum moderator) did a study in which he sent samples of oil to have them analyzed for ZDDP (actually, zinc and phosphorous) levels. That report showed the Castrol GTX 20W-50 having good levels of ZDDP per that study.Castrol® GTX® Classic is a high zinc formula providing extreme protection for your hot rod or classic car and high output engines with performance cams. Treat your flat tappet or push rod engine right with this authentic 20w-50 engine oil. www.castrol.com.Castrol Classic XL 20W-50 is a conventional multigrade engine oil of good all round performance, formulated with high quality mineral oils plus selected additives, ideally suited to older technology and classic car engines. Castrol Classic XL 20W-50 is designed to meet the motor manufacturers' requirements for passenger cars and1,005. Location. AR. Dec 19, 2020. #10. Hydrogear used to comes with Castrol 20W-50 out of the factory....obviously their main concern is the operating temperature number (nobody mows below freezing) - hence the usual Mobil 1 15W-50 sub - for good reason. The oil capacity is very low, and the temperature load is high.Castrol GTX helps extend engine life by tackling the main causes of sludge. It's advanced 3X-Clean formula surrounds and suspends dirt particles to keep engines cleaner for longer*. Giving you and your vehicle more miles together. *As measured in the Sequence VH test, against API SP engine limits.Castrol EDGE 25W-50. Castrol EDGE 25W-50 with Fluid TITANIUM is a race bred oil specially formulated for modified engines, push-rod technology, street machines, big bore competition engines, naturally aspirated, supercharged or turbocharged. Choose the right 25w-50 oil for your engine, Castrol EDGE 25W-50 with Fluid TITANIUM is a race bred oil ...Castrol SYNTEC 20W–50 motor oil is geared to protecting, preserving and helping extend the life of your vehicle from an age gone by that still lives on. ... Oils with high zinc and phosphorous content are designed for heavy loaded engines. Typically diesel engines and motorcycle engines are considered heavy loaded due to temperature …It will be interesting to see if the synthetic lowers your operating temperature. I have done very unscientific studies with 20w50 vs 10w40 in my ZRX 1200. Synthetic or conventional, in either case the lighter weight oil keeps the fan from coming on as soon in hot summer traffic. I ran Mobil 1 15w50 in the ZRX for an OCI.Castrol GTX Classic 20W-50 Conventional Motor Oil, 5 Quarts. 4.8 out of 5 stars 1,028. 2 offers from $40.12. Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 Quarts. 4.8 out of 5 stars 18,551. 3 offers from $21.72. Castrol Edge High Mileage 5W-30 Advanced Full Synthetic Motor Oil, 1 Quart.Castrol Classic XL20w/50 is a premium multigrade engine oil of good all round performance. Formulated with high quality mineral oils, plus carefully selected additives, it is ideally suited to older technology and classic car and motorcycle engines. For pre-1980 classic cars and motorcycles. A conventional 20W-50 multigrade engine oilThis oil's high zinc content provides extra protection for flat-tappet, roller cams, and other high-performance engine components, giving you peace of mind as you push your vehicle to its limits. From professional racers to weekend warriors, Valvoline VR1 Racing 20W-50 Engine Oil is the trusted choice for those who demand nothing but the best ...Castrol Conventional Engine Oil 20W-50 5 Quart Shop All Castrol. Castrol852666. Part # 15984B. SKU # 852666. Check if this fits your vehicle. In-Store Pickup. Select Store. ... sludge,* and protects against new sludge formation better than tough industry standards.,*When tested in engines with high level of deposits.The cam and tappets should be run-in by 250 to 500 km. Also ZDDP is temperature activated so running the engine at low oil temperature also accelerates cam and tappet wear. If a full synthetic engine oil is preferred then our Castrol Edge 0W-40 or Edge Sport 10W-60 is recommended.When it comes to operating in high-temperature environments, Castrol GTX has a slight edge over Pennzoil. ... Common grades include 5W-30, 10W-30, and 20W-50. Always consult your vehicle manual for the correct oil grade. Who makes the best quality engine oil?Classically, outside of the US, you will formulate 10W30, 10W40, 15W40, 15W50, 20W40 and 20W50 oils simultaneously. This will cover the full spectrum of predominantly mineral oil based grades. This being the case, if say you know the ZDDP content of one member of the family, there's an odds on chance you know it for all members of the family.Detailed Description. Motor Oil; Racing; 20W-50; 5 Quart; Valvoline VR1 Racing Oil's high zinc provides race-level protection for high performance engines. Valvoline Racing Oil's exclusive chemistry is designed to reduce friction and enhance power and provide extreme wear protection. It is among the most popular engine lubricants in all types ...The edible peel unlocks access to substances and nutrients which include tryptophan, vitamin B6, magnesium, zinc, and more sugar. Most of the world’s bananas are grown in tropical ...Vehicle Specific. GTX™ Classic SAE 20W-50 Conventional Hich Zinc Content Motor Oil by Castrol®. Castrol GTX Classic is a high performance formula for push-rod, flat tappet engines and performance cam applications. It's blended with high zinc and phosphorus content to help prevent premature aging, wear and metal fatigue on engines with high ...Castrol GTX Classic is a high-performance engine oil for push-rod, flat tappet engines and performance cam applications. It's specially formulated for classic/collector cars, muscle cars, hot rods and race cars. It's high zinc and phosphorus content helps prevent premature aging, wear and metal fatigue on engines with high tension valve ...This creates extreme internal pressure, friction and operating temperatures that can breakdown a weaker engine oil and leave critical parts vulnerable to wear and fatigue. Castrol EDGE is an advanced full synthetic motor oil that's been specially formulated with the strength to withstand the intense forces of high output engines and provide ...Castrol's Classic engine oils XL30, XXL40, GP50 and XL20w-50 are formulated to the original viscosities and contain the necessary levels of ZDDP anti-wear additive to provide appropriate protection for veteran, vintage and classic engines. The range is available throughout the UK via leading car specialists.Product Description. Castrol GTX Classic is a high-performance engine oil for push-rod, flat tappet engines and performance cam applications. It's specially formulated for classic/collector cars, muscle cars, hot rods and race cars. It's high zinc and phosphorus content helps prevent premature aging, wear and metal fatigue on engines with ... Castrol GTX High Mileage Synthetic Blend Motor Oil 10This 3 Brothers kit includes 7 litres of But they just went slower due to the high windage and los
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Motor Oil, VR1 Racing, High Zinc, 20W50, Conventional, 1 qt Bottle, Each. 5.0 out of 5 stars. 3. No featured offers available $19.37 (1 new offer) MOBIL 1 20W50 Fully Synthetic Motorcycle Oil. ... Castrol Edge High Mileage 20W-50 Advanced Full Synthetic Motor Oil, 1 Quart, Pack of 6. 4.4 out of 5 stars. 153. $40.08 $ 40. 08 ($0.21 $0.21 /Fl Oz)Castrol Edge 5w-50 high zinc oil. Thread starter Drew99GT; Start date Oct 26, 2011; Status Not open for further replies. D. Drew99GT. Joined Oct 11, 2002 Messages 22,183 Location ... Syntec 20W-50 was the same deal - looked like a GREAT product, but hardly anybody on here has ever seen it in a store, and we'd be the ones that would …Castrol's Classic engine oils XL30, XXL40, GP50 and XL20w-50 are formulated to the original viscosities and contain the necessary levels of ZDDP anti-wear additive to provide appropriate protection for veteran, vintage and classic engines. The range is available throughout the UK via leading car specialists.Buy Castrol GTX High Mileage Motor Oil 20W50 Semi-Synthetic 1 qt (US) - CAS 470 online from NAPA Auto Parts Stores. Get deals on automotive parts, truck parts and more. Memorial Day: 20% Off - Code: HONOR ... Castrol GTX High Mileage specifically formulated for vehicles with 75K+ miles. Get more life from your vehicle with Castrol …Castrol Edge High Mileage 0W-20 Advanced Full Synthetic Motor Oil, 1 Quart. Add. $8.48. current price $8.48. ... Castrol GTX 20W-50 Conventional Motor Oil, 1 Quart. Key Features: Superior protection against engine sludge; Advanced protection against viscosity and thermal breakdown;Both will be fine on Castrol 0w40, it has enough zinc to prevent tappet wear and higher viscosity these old timers need. 15w40 in the 2.0 will noticable bog it down, it only has 99 HP to begin with. ... The 20W-50 version has a good following in the Harley-Davidson community because of the higher zinc additive. ... high zinc in these engines is ...CASTROL GTX CLASSIC 20W-50 5L. SKU 0287984. $44.99. Select a Store to view Availability. GTX Classic is a high-performance formula for push-rod, flat tappet engines and performance cam applications. Specially formulated engine oil for classic/collector cars, muscle cars, hot rods and race cars. Specialized additives containing high Zinc and ...Feb 12, 2009 · I meant to say 20W50 but anyway here is what they said: "Thank you for contacting Castrol, Castrol North America does not manufacture GTX in a 20w-40 grade. The latest API SM/ILSAC GF-4 category calls for reduced Zinc and Phosphorus levels to allow extended catalyst life in current model vehicles.CASTROL POWER1 V-TWIN | WELCOME | CASTROL USA Castrol Actevo is another choice of 20-50. Castrol Go T4 20-50 is a conventional oil 20-50. A high zinc content can reduce cam & tappet & adjuster screw tip wear. It really does in real life. I use Mobile1 v-twin 20-50. According to the spec sheet it has one of the highest zinc levels for motorcycle ...Heritage 20W/50 Multigrade Classic Oil Blended in the UK to our formulation, its high-zinc content (1300 parts per million) makes it ideal for engines with heavily-loaded rubbing surfaces, eg cam lobes and tappets.Royal Purple Motor Oil, HPS High Performance Street, High Zinc, 20W50, Synthetic, 1 qt Bottle, Each. 2,312. $1579 ($0.04/Fl Oz) Save more with Subscribe & Save. FREE delivery Mon, Sep 11 on $25 of items shipped by Amazon. Or fastest delivery Thu, Sep 7.Time for an oil change and I have been using the Castrol 20-50 weight motor oil but today I noticed a Castrol GTX Classic High Zinc Content motor oil at Wal-Mart, $5.38 a quart. I am curious if it has enough zinc in it so that I don't have to add the ZDDP that I have been purchasing at OGTS. ... Castrol GTX Classic 20W-50 Conventional Motor Oil ...Castrol has a variety of motor oils that meet and exceed a range of specifications, all to meet your vehicle’s specific needs. That is why we have different options for you to choose from, such as Castrol GTX, Castrol Edge, and a range of High Milage products. It’s important to know the benefits of each motor oil, so explore some of the ...There are two ways to get high zinc engine break-in oil: pre-formulated with high zinc or use a base oil with a ZDDP zinc additive for engine break-in. Buying off-the-shelf high zinc break-in oil is quick and easy; this is the best break-in oil for flat tappet cams. These oils are specially formulated to give you precisely what you need for a ...The CNBP gene provides instructions for making a protein called CCHC-type zinc finger nucleic acid binding protein. Learn about this gene and related health conditions. The CNBP ge...71196, Synthetic Blend High Performance Oil SAE 20W-50, 1 Quart (12 Pack) 678. 200+ bought in past month. $10499 ($0.27/Fl Oz) FREE delivery Thu, Jun 6. Or fastest delivery Sat, Jun 1. Only 16 left in stock - order soon. More Buying Choices.In the case of Castrol GTX Classic, high-zinc (ZDDP) anti-wear additives are heat activated, which means that as the engine warms up, the sliding and rolling motion of the engine's moving parts, particularly the valvetrain components, takes place on top or within the ZDDP anti-wear film. ... 20W50 grade. Besides its high zinc and phosphorous ...SKU ES-CC20W50-1. $14.95. Castrol GTX Classic 20W50 Conventional Engine Oil 1 Litre Jug. For Series 1 to 3, 1.6L, 2.0L, 2.25L, 2.6L Gas and Diesel Engines. Castrol® GTX® Classic is a high performance formula for push-rod, flat tappet engines and performance cam applications. It’s blended with high zinc and phosphorus content to help prevent ...But they just went slower due to the high windage and losses and I was soon back to Havoline 10W30. ... "Castrol GTX Classic" 20W-50. OilMagnate; Mar 20, 2021; Passenger Car Motor Oil (PCMO) - Gasoline Vehicles; 3 4 5. Replies 86 Views 44K. May 3, 2023. Ausfahrt. H. Valvoline VR1 Racing vs Castrol GTX Classic (20/50)I run the 15w40 or 20w50 in summer, though not always. The 2F is a big hearty tractor motor and is very tolerant of different viscosities - FWIW, I've been running high-zinc oil since the engine was rebuilt in 2008, and installed that new Magnaflow CAT at the time and still pass smog in Los Angeles which is even more difficult because of AQMD ...337 posts · Joined 2018. #17 · Mar 6, 2019. The VYep, a Euro oil like Castrol Edge / M1 / PP-Euro in 0W
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2) Some investigation will reveal that Valvoline VR-1 20W/50 Racing Oil ($4 a quart and available everywhere) has the same ZDDP content as high-end racing oils and non-street legal oils. This does not seem to be the case for Castrol GTX 20W/50, which is what most Alfa nuts run or were in the past told to run on this forum.Castrol GTX 20W-50 Conventional Motor Oil, 5 Quarts. Best seller. Add. $22.96. current price $22.96. ... Castrol EDGE High Mileage 0W-20 Advanced Full Synthetic Motor Oil, 5 Quarts. Add. Sponsored. $27.48. ... Valvoline Oil Zinc; Valvoline Racing & Motorcycle Oil; Castrol Diesel Oil; 5w40 Oil Castrol; Castrol Stroke Oil;Zinc plating is an important process in the manufacturing of metal products. It is used to protect metal surfaces from corrosion and wear, as well as to improve the appearance of t...Andrew, I don't know about the regular Castrol product line, but Castroi does make a special oil for cars that require a higher zinc content. It is called Castrol Classic and is available in 20/50 weight. You can but it at any Wal Mart. Kendal also make a high zinc 20/50 weight oil It is called Kendal Liquid Titanium.Full synthetic 5W-40 motor oil is formulated to flow like 5 Weight oil from a cold start in winter temperatures and like 40 Weight oil once the engine has reached its normal operating temperature.Castrol® EDGE® is an advanced full synthetic 5W-40 motor oil. It's our strongest oil and liquid engineered to withstand the high pressure and high ...Buy Motul Classic 20W-50 Performance Motor Oil Engine Mineral Multi-grade 5 Liter 109560: ... Formulated with blend of High-Zinc (ZDDP) and Molybdmenum ... Castrol GTX Classic 20W-50 Conventional Motor Oil, 1 Quart, Pack of 6. dummy. Motul 7100 Synthetic Oil 4T - 10W40 - 4 Liter/--What are the benefits of Castrol EDGE? Protection for 20,000 miles between oil changes×. 3X stronger than the leading full synthetic*. 10X better high stress performance**. Also suitable for hybrids (0W grades) Improves fuel economy (0W grades) × Up to 20,000 miles or 1 year, whichever comes first. *In viscosity breakdown as measured in Kurt ...AMSOIL 20W-50 100% Synthetic Hydrostatic Transmission Fluid. Synthetic, high-zinc formula fights wear. Built for hydrostatic transmissions to maintain mower speed and efficiency better than motor oil. Promotes long transmission life for professionals who depend on their equipment to make a living. See the product data sheet for full details.This premium 3 Brothers kit includes 10 litres of Castrol 20W50 High Zinc Oil - 7 litres for your standard oil change and and extra 3 litres for the oil bath air filter. The premium kit also includes 1 litre of Castrol Classic EP90 API GL4 Extreme Pressure Gear Oil, the longer style oil filter (RTC3185), copper sump seal, and a Castrol mileage ...Castrol Edge High Mileage 20W-50 Advanced Full Synthetic Motor Oil, 1 Quart, Pack of 6. 4.4 out of 5 stars. 154. ... Royal Purple Motor Oil, HPS High Performance Street, High Zinc, 20W50, Synthetic, 1 qt Bottle, Each. 4.8 out of 5 stars. 2,406. $14.99 $ 14. 99 ($0.04 $0.04 /Fl Oz)Feb 4, 2008 · This item: Castrol Edge High Mileage 20W-50 Advanced Full Synthetic Motor Oil, 1 Quart, Pack of 6 $40.08 $ 40 . 08 ($0.21/Fl Oz) Get it as soon as Monday, Jun 3Jun 10, 2020 · Kendall GT-1 is the choice. Last I knew VR-1 has little if any detergents, used more for the track. Brad Penn is likely the same, is more expensive and is a pita to find. For years until Castrol changed the formula and lowered the zinc and phosphorus levels, Castrol GTX 20w-50 was the go to motor oil for English cars and many other European cars.Valvoline's VR1 Motor Oil - The #1 selling racing motor oil and race track proven. VR1 Racing Motor Oil's exclusive chemistry is designed to reduce friction and enhance power. It is among the most popular engine lubricants in all types of racing including CART, stock car and drag racing. It is recommended for engines burning …Castrol GTX Classic 20W-50 Conventional Motor Oil, 1 Quart. Key Features: Specialized additives containing high Zinc and Phosphorus for extreme wear protection; Formulated to maintain tough and thick oil film even under severe conditions; Minimal foaming and high resistance to thermal degradation; Compatible with gasoline and alcohol based fuelsYou'll have to do some more research but I believe that the recommended oil, Castrol 20W50, still contains a lot more zinc than other motor oils, and is specifically intended for older engines. skill. 01-05-2014, 09:03 PM. ... 10W-40 AMSOL XL 10w40, Valvoline Durablend, Castrol Syntec, Mobil 1 High Mileage and Shell Helix HX7Millers Oils recommends an optimum amount between 1000 - 1400 ppm of ZDDP. Too little won't offer enough anti-wear protection, and too much will not provide increased levels of protection, but can actually create friction and increase wear due to the 'over-plating' of components. In addition, high levels of ZDDP in an oil can harm ...Buy Castrol GTX High Mileage Motor Oil 20W50 Semi-Synthetic 1 qt (US) - CAS 470 online from NAPA Auto Parts Stores. Get deals on automotive parts, truck parts and more. Memorial Day: 20% Off - Code: HONOR ... Castrol GTX High Mileage specifically formulated for vehicles with 75K+ miles. Get more life from your vehicle with Castrol …Amsoil Z-ROD 20W-50 Synthetic Motor Oil is specially engineered for classic cars. It contains high levels of ZDDP, top-tier additives, and rust inhibitors to protect your beloved classic hot rod. It can deliver maximum performance and free your classic engine from rust and corrosion in storage. It has 1575 ppm of Zinc and 1424 ppm of Phosphorus ...Time for an oil change and I have been using the Castrol 20-50 weight motor oil but today I noticed a Castrol GTX Classic High Zinc Content motor oil at Wal-Mart, $5.38 a quart. I am curious if it has enough zinc in it so that I don't have to add the ZDDP that I have been purchasing at OGTS. ... Castrol GTX Classic 20W-50 …Castrol GTX 20W-50 Superior sludge protection for greater engine reliability Description Castrol GTX is one of the world's most trusted motor oils. It provides superior protection against oil burn-off, 60% better than the tough industry test* It is one of the world s leading oils for high mileage cars. It's more than just oil.Castrol GTX 20W-50 Conventional Motor Oil, 5 Quarts . Visit the Castrol Store. 4.8 4.8 out of 5 stars 10,680 ratings | Search this page . 200+ bought in past month. $35.01 $ 35. 01 $0.22 per Fl Oz ($0.22 $0.22 / Fl Oz) FREE Returns . Return this item for free.Superior Sludge Protection: Castrol GTX 20W-50 is specially formulated to provide unrivalled sludge protection. Its advanced additives actively combat the formation of harmful engine deposits, helping to keep your engine clean and free from harmful build-up. With this level of protection, you can rest easy, knowing that your engine is well-guarded against the damaging effects of sludge.Castrol® GTX® High Mileage 20W-50 is the #1 consumer high-mileage brand of motor oil. It's a synthetic blend engine oil that helps extend the life of engines by protecting against sludge, wear and burn-off.Flat tappet camshafts with elevated valve spring pressures need Zinc as a sacrificial additive. Most '60s cars can just use a good 10w30. I have used Shell Rotella T 15w40 in my Vette and Oldsey, but I understand the good stuff is no longer available. Both have pretty stock valve trains.Burlington, Ontario, Canada. Feb 3, 2013. #10. Nice high ZDDP level. The 17.42cSt KV100 VOA is lower than Castrol's published PDS figure of 18.5cSt. The GP III 5W-50 oils tend to be very shear prone and have high NOACK values. If one actually needs to run a 50wt oil it's best to have an oil pressure gauge to make sure adequate OP is being ...Castrol Edge 5w-50 high zinc oil. Thread starter Drew99GT; Start date Oct 26, 2011; Status Not open for further replies. D. Drew99GT. Joined Oct 11, 2002 Messages 22,183 Location ... Syntec 20W-50 was the same deal - looked like a GREAT product, but hardly anybody on here has ever seen it in a store, and we'd be the ones that would …Castrol® GTX® Classic is a high zinc formula providing extreme protection for your hot rod or classic car and high output engines with performance cams. Treat your flat tappet or push rod engine right with this authentic 20w-50 engine oil. “At 50, everyone has the face he (or she) deserves.”. - George Orwell .Thank you for contacting Castrol. Harley-Davidson recommends the use of their genuine oils at all times or, if not available, to use an SAE 20W-50, API SL/CF oil that meets their HD 240 (1996-2005 model year) or HD 360 (2006 and newer model year) ratings. Although we have no doubt that our Power RS products will provide the required … Also known as Semi Synthetic or Synthetic Blend engine oi