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Read through our latest reviews, guides, and news to get the inside scoop on Royal Jordanian. Many of the credit card offers that appear on the website are from credit card compani...After reading through all 5 pages in this section I wasn't able to find something like this. I know people have reviewd each BRAND separately and said good...What the BEST oil in your opinion? Amsoil Votes: 171 37.7% 171 37.7%The Mobil 1 synthetic motor oil is designed to keep engines running at their best. It’s a high-performance, low-viscosity oil that provides superior protection against engine wear and deposits. And it’s formulated with an advanced additive system that helps prevent fuel dilution for increased power and performance.The highest reduction in NOx emissions was between Royal Purple and Amsoil, with Royal Purple tests showing an average NOx production that is 12.06% lower than that of the Amsoil tests. 26 1600 RPM NOx Comparison 290 340 390 440 490 25 30 35 40 45 50 55 BM EP (PSI) NOx (parts per million) She ll Rotella 15-40 Amsoil 15W-40 Royal P urple 15W-40 ...I have seen many times the friction test of oils using the machine that tests the oil film, test result shows that Royal Purple has more friction protection that Mobil 1 oil does,seeing these results makes me think that Mobil 1 oil is lacking some benefits, therefore Royal Purple has the better protection of all.".Different results came in the TOEOS test of these two motor oils. After any motor oil use at high temperatures, there are many deposits left at the end. It is important to check these to avoid bad performance. Royal Purple: It produced a deposit of 10 out of 100. Mobil 1: It produced a deposit of 45 out of 100.We may earn a commission for products purchased through links on this pageThe testing revealed that Amsoil flows faster than Redline. Therefore, Amsoil is a lighter oil than Redline. Also, the engine operates smoothly and efficiently with thinner oil since it moves through the system more quickly. Flow rates in Amsoil don't drop much even when temperatures outside are low.Amsoil vs. Mobil 1 lab testing. Amsoil vs. Mobil 1 on the dyno. Amsoil vs. Red Line Oil. Engine break-in. 10 myths of synthetic oil. Are Oil Additives Good? Synthetic compared to conventional. Mercedes-Benz law suit for not recommending synthetic. The brainwashing of consumers. On the dyno compared to Mobil, Castrol, Royal Purple, Torco, Shell ...Amsoil 5-30W Signature Series Vs Mobil 1 0-30W AFE. Mephy; Apr 2, 2024; Passenger Car Motor Oil (PCMO) - Gasoline Vehicles; 2 3. Replies 45 Views 3K. Apr 18, 2024. H. Swanson. Mobil 1 Truck SUV vs Extended Performance. Nuclear_42; Jan 28, 2024; Passenger Car Motor Oil (PCMO) - Gasoline Vehicles; 2. Replies 27 Views 5K. Apr 3, 2024.After reading through all 5 pages in this section I wasn't able to find something like this. I know people have reviewd each BRAND separately and said good...Excalibur. 13652 posts · Joined 2007. #22 · Jul 2, 2008. Mobil1, royal purple, amsoil, motul, whichever's cheaper. = engine. Amsoil = tranny. That's how I would do it. I like to go back to royal purple every 20k miles or so since they claim it's good for repairing the internals apparently. Like.Harley-Davidson Part#99816-60HD Engine Oil--AMSOIL Product MCS SAE 60 Engine Oil &/or MCV 20W-50 Engine. 99851-05 Formula + MCV 20W-50 Engine Oil. 99824-03 Screamin Eagle Syn 3 MCV 20W-50 Engine Oil. 99887-84 Primary Lube MCV 20W-50 Engine Oil. 99892-84 Transmission Lube SVT 75W-110 Gear Lube &/or MCS …Last year, AMSOIL reformulated this fluid and slightly lowered its hot cSt viscosity from about 7.2 to 6.8 so as to make it suitable for GM's new Dexron VI specification. A nominal Dexron III fluid has a new hot viscosity of about 7.3, but shears rapidly down to about 5.0-5.5.The Purple Heart is a non-profit organization that provides assistance to veterans of the U.S. military. Funds are raised through the donations of vehicles from people who wish to ...One reason to single out Royal Caribbean for a stock investment is the company's cash benefits policy for shareholders who take cruises. The holding company Royal Caribbean Cruises...10. Cost and Budget-Friendliness. Mobil 1 Full-Synthetic is the more budget-friendly option, offering quality synthetic oil at a more affordable price than Mobil 1 Extended Performance. Meanwhile, Mobil 1 Extended Performance may be slightly more expensive but offers extended protection and longer oil change intervals.75% more engine protection against horsepower loss and wear. 1; 50% more cleaning power vs. AMSOIL OE Motor Oil; ... AMSOIL Signature Series(5W-30) Royal Purple High Performance (5W-30) Lucas (5W-30) Driven LS30 (5W-30) ... There's Mobil 1, which is very good and then AMSOIL! I always have a sense of relief after an oil hand on the Vette and ...Re: Royal Purple vs. Mobil 1 vs. Amsoil & other synthetics: which ... (purplejettahondaeater) Quote, originally posted by purplejettahondaeater » i run amsoil because it's silicone based instead of dino-oil based the other major syn. oils are all still based/built upon a dino base...The highest reduction in NOx emissions was between Royal Purple and Amsoil, with Royal Purple tests showing an average NOx production that is 12.06% lower than that of the Amsoil tests. 26 1600 RPM NOx Comparison 290 340 390 440 490 25 30 35 40 45 50 55 BM EP (PSI) NOx (parts per million) She ll Rotella 15-40 Amsoil 15W-40 Royal P urple 15W-40 ...What makes royal purple about TWICE as much as Mobil 1 and Schaeffers? royal purple max gear $18.99 Mobil one $8.99 Schaeffers 293 75-90 $10.76 ... I used the Amsoil comparison sheet for data on other brands, and I think it would have wiped the floor with the exception of super cold temp performance being its a 80W90 …17871 posts · Joined 2010. #31 · Feb 20, 2012. how much money is that amsoil a qt compaired to the gn4 ....the only reason i ask is i get the shell rotella t 15w40 at wally world for $15.38 a gallon . i was running the valvoline atv oil from autozone at $399 a qt. i like the rotella t now. 2000 foreman 450 es-s.Royal Purple 51530 API-Licensed SAE 5W-30. Royal Purple ROY11748 HMX SAE 5W-30. Royal Purple 05154 API-Licensed SAE 15W-40. Mobil 1. Synthetic Oil. Recommended Mobil 1 Synthetic Oil to Buy. Mobil 1 96936 20W-50 V-Twin. Mobil 1 (120760) 0W-40 Motor Oil. Mercedes-Benz Q-1-09-0015 – Mobil 1 Oil 0w40 Motor Oil.Price-wise, with the dealer discount, the cost of Amsoil XL and Mobil 1 EP is within $0.25/qt. Considering that Mobil 1 would require a trip to WM and Amsoil comes to my door, the price is about the same. Also, I do not service any GM vehicles requiring a licensed Dexos product, so the lack of official Dexos licensing on the Amsoil XL product ...Amsoil is a synthetic oil that is known for its high quality. It is made to withstand high temperatures and is resistant to wear and tear. It also has a long lifespan, meaning you don't have to change it as often as other oils. Liqui Moly is a synthetic blend oil that is known for its high performance. It is made to withstand high ...C5 Forced Induction/Nitrous - Mobil 1 vs Amsoil vs Royal Purple with FI - I have about 700 miles on my Forged motor and am getting ready to change the oil soon. What oil do you guys recommend? What weight? I've head some pretty good things about Amsoil and Royal Purple. Are they really any better than Mobil 1? What...AMSOIL Signature Series 5W-30 Synthetic Motor Oil held the total weight of deposits to 7 mg, well under the 30 mg limit required by the API and ILSAC, while Royal Purple® API 5W-30 and Mobil 1 Extended Performance 5W-30 came in just under the limit at 25.4 mg and 28.2 mg respectively. Signature Series 5W-30 Synthetic Motor Oil protects against ...The health of the engine is also dependent upon the kind of oil being used. Mobil 1 advanced fuel economy, as its name suggests, has shown up to 2 percent of improved fuel economy and this has saved the …Over the years I've run Mobil 1, Amsoil, Castrol, Pennzoil, Valvoline and even a short stint with Royal Purple. Truth be told there are a lot of good oils, but different cars have different needs and one oil might be a better choice than another based on that. For instance my wife's BMW calls for an oil with the BMW Longlife-01 spec and M1 0w40 ...The colors that a person would need to mix in order to make royal blue are primary blue and purple. Since royal blue is a shade of blue, all you need to do is darken the blue to ma...The best oils are PAO Group IV oils, which are Amsoil, Royal Purple, and Mobil 1. Amsoil doesn't cost any more either. People balk at the price, but when you extend oil change intervals, even without UOA, the cost is about the same as more frequent changes with standard oil, and less labour too.Comparison of Synthetic Motor Oils - AMSOIL vs. Mobil 1: Performance Comparison. When it comes to comparing the performance of AMSOIL and Mobil 1, there are several key factors we need to consider.In this section, we'll take a closer look at engine protection and wear, viscosity and temperature stability, fuel efficiency, as well as additives and contaminant control.IF I'm not mistaken, the 07+ R1 uses a Mobil 1 ME-110 filter. I run a Purolator Pure One oil filter that cost about $7.00 at Advance Auto Parts. I like the fact that it is longer than an OEM filter, and holds more oil. Gives me a higher oil capacity, and, in turn, better oil quality over the oil change intervals.We may earn a commission for products purchased through links on this pageThe Amsoil filter is fine and fully warranted to use in our HC engines, stock or built. One reason the factory wants a 0 weight oil run in stock HC's is due to the close tolerances the motor is built with. Now that Petty's Garage did their 1,000hp package on my motor they strongly recommend to run 15w-50 Racing oil which I do now.Dark Mode; Light ModeI ran Royal Purple 5w20 and Mobil 1 and startup and valve train noise we bad with both. Reactions: usaf2006 and blackbeautyhemi. Oct 21, 2016 #10 OP . OP. blackbeautyhemi Senior Member. Joined May 19, 2013 Posts 2,190 Reaction score 1,314 Location Lewistown, PA Ram Year 2015 Engine 5.7 HEMI.Learn about blue to purple annual flowers such as sweet alyssum and heliotrope that you can use in your garden design at HowStuffWorks. Advertisement Annuals are flowers that bloom...1652 posts · Joined 2014. #4 · Nov 6, 2014. I have used the Victory oil filter which is said to be made by Wix, the Mobil One oil filter and now use the Royal Purple oil filter due to its full synthetic media. All of the above are good filters and thought others would be interested in the cut away of each of those filters.1. Cold and Hot Temps. Amsoil synthetic motor oils flow faster in cold temperatures; they seem lighter than Royal Purple oils, which makes them flow faster. So, if you live in an area with low temperatures, Amsoil synthetic oils would perform better for your engine than Royal Purple. 2.AMSOIL Signature Series 5W-30 Synthetic Motor Oil held the total weight of deposits to 7 mg, well under the 30 mg limit required by the API and ILSAC, while Royal Purple® API 5W-30 and Mobil 1 Extended Performance 5W-30 came in just under the limit at 25.4 mg and 28.2 mg respectively. Signature Series 5W-30 Synthetic Motor Oil protects against ...AMSOIL Performance Test. AMSOIL 100% Synthetic High-Mileage Motor Oil provides up to 62% better deposit prevention.WW1. WW1Based on independent testing of AMSOIL 0W-20 100% Synthetic High-Mileage Motor Oil, Valvoline* Full Synthetic High-Mileage with MaxLife* Technology 0W-20 Motor Oil (batch codeJ2622C5 purchased December 21, 2022) and Mobil 1 ...Use Mobil 1 Super Syn gear oil. Its better than amsoil, redline, or RP. Actually I have a 50 page text which an independent lab tested all major gear lubes, mobil 1 and valvoline were some of the poorest on the wear scar tests. Highest were gm brand, ford brand and amsoil, royal purple tested about mid level, cant remember what redline tested at.Royal Purple vs Mobil 1 - Calidad del aceite. Cuando se trata de la calidad del aceite de motor, el donut API es, con mucho, la mejor manera de determinar la calidad del producto. Todos los envases de aceite tienen que llevar la marca del donut API que describe la categoría de servicio API, la clasificación de peso SAE y las propiedades de ...Royal Purple vs Mobil 1 - It is quite challenging to choose the best one between Royal purple and Mobil 1. In terms of cost & additive technology, Mobil 1 is...Viscocity: Mobil 1 has a wider range of oil grades that support different climatic conditions whereas the Toyota Synthetic oil range has a much thinner viscosity allowing it to work best in cold conditions. Cost: The Toyota synthetic oil range is comparatively cheaper than Mobil 1. Fuel Economy: With varying degrees of viscosity and resistance ...Dec 21, 2016. #6. For the manual trans and rear end, Amsoil is one of the best you can put in. For the engine with XL, it's a fine choice but not top of the line like Amsoil SS, Mobil 1, Penn. Plat/Ultra, Castrol Edge, etc. You don't have disclose why you are paying for this, but essentially if you can change the engine oil you can do the ...Amsoil vs Royal Purple Thread starter StStang0702; Start date May 6, 2010; 1; 2; Next. 1 of 2 Go to page. Go. Next Last. May 6, 2010 ... i liked ROP but i'm using mobil 1 now. this is gonna sound extremely retarded but do manual trannys have a way to drain the fluid? i only ask cause my bros friend owns a shop and he said that standards you …Jan 28, 2004 · Jul 18, 2004. #6. I will give you my 2cents worth based on using royal purple street 10w-30 for 20,000 miles and Mobil 1 for about the same milage. UOA on Royal Purple at 7500 mile change showed a 10w-30 had become a low 20 weight oil. This and the wear metals were less than impressive.1. Temperature Stability. Both oils are designed to withstand varying temperatures, but there are subtle differences. Pennzoil Platinum, with its PurePlus Technology, ensures consistent viscosity even at higher temperatures, minimizing the chances of oil breakdown. Mobil 1, on the other hand, stands out in colder climates.We may earn a commission for products purchased through links on this pageIt's testing $19.99 kits from Purple Carrot. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its partners. I agree to Money's Terms of Use and Pr...Here is a link to a previous discussion on royal purple. While there are benefits to Royal Purple, Royal purple doesn't offer extended drain intervals, fewer visits to your mechanic, better performance, better MPG, emit cleaner exhaust. Not only that but AMSOIL backs that up with a warranty.3933 posts · Joined 2008. #7 · Jun 28, 2010 (Edited) mobile 1 has always been good to me and it's cheaper than motul or amsoil. The minimal gains don't mean anything to me. You could get the same gains on a cooler day. Not a bigenough change to warrant the expense of the oil. This is just my opinion on the matter. Independent testing shows Amsoil is better11 posts · Joined 2013. #24 · Nov 29, 20The Royal Purple showed a significantly high volatility

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AMSOIL XL Motor Oil is well-matched with both conventional.

Thing is, in a sound/well built engine - Amsoil, Castrol, Mobil, Royal Purple, RedLine, whatever - your engine will outlast your car unless you drive 500,000+ miles a year. ... Interesting read Mobil 1 vs Amsoil study to 15k miles. Neptune Oil Study . U. ULVER. Joined Sep 21, 2004 Messages 502 Location Atlanta, Ga. Oct 25, 2006 #32 I …8.2. As shown in the table, AMSOIL’s TBN number of 10.1 surpasses Royal Purple’s TBN number of 8.2. This significant difference indicates that AMSOIL not only provides excellent acid neutralization but also offers enhanced motor oil quality and protection against acid-related corrosion.We may earn a commission for products purchased through links on this pageFor instance, comparing the life of the oil, AMSOIL oil provides around 25,000 miles before being drained while Mobil 1 and Royal Purple provide a durability of 15,000 miles and 12,000 miles respectively. However, as compared to the other oils, AMSOIL is also the most expensive one.Aug 16, 2012. #4. You have to look at the big picture in regard to synthetic oils. ANY synthetic oil, whether off the store shelf (Pennzoil, Mobil 1) or sold through a distributor (Amsoil, Redline)will provide MORE than adequate protection and performance for any engine. Use Amsoil, Pennzoil, Valvoline, Mobil 1, etc... with complete confidence.Here is a detailed comparison of three oil filters that fit the most common 2021 Ford F-150 engines: the AMSOIL EAO17, the Mobil-1 M1-212A, and the K&N Perfo...Back to AMSOIL vs. Royal Purple, you have to look at the differences between the oils to know which one is better. A noticeable contrasting point is a color; AMSOIL has the typical oil color, while Royal Purple has its signature purple hue.Only one oil wins in every test...Amsoil !!! Oils in these tests are: Mobil 1, Royal Purple, Valvoline, Red Line, Spectro, Harley Davidson...just to name a few. I run: Amsoil 20W50 in the motor Amsoil 85W140 Severe Gear in the tranny Amsoil Super Shift in the primary. I just tore my motor apart with 8600 miles on it to do a 117" build.Mobile 1 vs. amsoil vs. Royal Purple comparison; ... Like i said, only mobil 1 v-twin or amsoil v-twin for my xb12. 08-10-2011, 04:58 AM #30. rodimus prime. View Profile View Forum Posts Private Message Senior Member Join Date Jan 2011 Posts 117. crxtasy, it sounds like you have no business working on engines. ...What Are the Differences Between Royal Purple vs Mobil 1 Oil? The main difference between Royal Purple and Mobil 1 oil is in their primary application — Royal Purple is specifically formulated as a gear oil, while Mobil 1 is designed as a motor oil. This distinction determines their intended usage and performance characteristics.I switched to Royal Purple 5w20 in my "C" (had been using Mobil 1) after seeing some test results posted in this forum in another oil thread; they tests were done by Blackstone Laboratory and showed that Royal Purple had a lot more zinc and molybdenum (sp?) - - major anti wear additives - - compared to Mobil 1.Mobile 1 vs. amsoil vs. Royal Purple comparison; ... Mobil 1 - Bit smoother shifts, seems to break down in the heat a little worse than other brands Lucas - Loved it, made it run pretty well, smooth shift Amsoil - Just like Lucas, butt dyno registers better performance and not as hot. Didn't appear to break down as much as Mobile 1 or Harley****.Don't know. Also, which viscosities should I run? I don't know how fair it would be to compare different viscosities... I figure a 20 weight will give me the best MPG, so I'll start with that I guess... Mobil 0W-20 vs. AMSOil 0W-20.. could also do Mobil 0W-30 vs. AMSOil 0W-30. lol.. Looks like theres a new product, Mobil 1 Extended Performance.75% more engine protection against horsepower loss and wear. 1; 50% more cleaning power vs. AMSOIL OE Motor Oil; Protects turbochargers 72% better than required 2 by the GM dexos1 Gen 2 specification.; 28% more acid-neutralizing power than Mobil 1. 3; Trusted by professional engine builders; Guaranteed protection for up to 25,000 miles or 1 year; 1 …Royal Purple VS Amsoil? Jump to Latest Follow 21 - 33 of 33 Posts. 1 ...Mobile 1 is to overpriced for being a almost full syn oil. Royal Purple is good but their are better oils for that price out there. Redline or Amsoil. I actually use NAPA Syn on my car because its actually Valvoline Syn. Half the cost and works just as good. Reply. Save. Like. rk_2000_Z/28 · #9 · Mar 9, 2012.138 posts · Joined 2002. #3 · Oct 23, 2002. One more point, I thought it was interesting that Redline had a higher flash point (better) on the 20w-50 than Amsoil, BUT Amsoil had a higher flash point than Redline on the 5W-30 (which is what the Tundra takes) and Mobil 1 has a higher viscosity index than Redline in the 5W-30.Amsoil was the first synthetic oil company to have their oil certified and licensed by the API in 1972. I don't know if Redline ever certified any of their oils. Mobil joined the market around 3 to 4 years later with their 5w 20 oil. Mobil followed Amsoil's lead with 25,000 mile oil changes back then.AMSOIL is not cheap -– a gallon of 5W-30 is almost $90 on Amazon – but the company's high quality standards have earned it a 4.7 star rating and many positive reviews on that website, and over ...I ran Royal Purple 5w20 and Mobil 1 and startup and valvRoyal Purple vs Mobil 1 - It is quite challenging to choos

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MOBIL 1 Vs. AMSOIL. ... redline, amsoil, royal purple(my personal choice) and torco are all PAO oils, car craft mag did a test like 2-3 years ago on royal purple and it showed a ~12-15hp difference on a 450hp small block chevy. I'll see if i can find it on the net. Rule of thumb typically adds 2-5% hp increase in PAO oils over conventional base ...Mostly comes down to Motul, Mobil1, Castrol and Redline for engine oils. For gear stuff Amsoil can be seen, Redline is regular, Motul more common, OE stuff most common. For brake fluids Motul and ATE are by far most common, Castrol SRF if things are really hot and budget is bigger. A.Wix XP vs K&N vs Royal Purple vs Amsoil vs Fram Pro Synthetic Subscribe: http://youtube.com/carsntoys Helpful Tools: https://www.amazon.com/shop/carsnto...Whether you're building or renovating your house, choosing the right drywall for your interior ceilings and walls is one important decision to make. Expert Advice On Improving Your...For example, AMSOIL Signature Series is fortified with a heavy treatment of detergent additives, helping it deliver 28% more acid-neutralizing power 1 than Mobil 1,* helping engines to stay cleaner, longer. Therefore, if you dilute Signature Series with another brand, you also dilute the additives, reducing performance.Here is a link to a previous discussion on royal purple. While there are benefits to Royal Purple, Royal purple doesn't offer extended drain intervals, fewer visits to your mechanic, better performance, better MPG, emit cleaner exhaust. Not only that but AMSOIL backs that up with a warranty.What makes royal purple about TWICE as much as Mobil 1 and Schaeffers? royal purple max gear $18.99 Mobil one $8.99 Schaeffers 293 75-90 $10.76 ... I used the Amsoil comparison sheet for data on other brands, and I think it would have wiped the floor with the exception of super cold temp performance being its a 80W90 …I use ROYAL Purple but those 2 brands are still very good oils. Cant go wrong with either. 2003 C5 ZO6 New setup.. RX427TT ... including a direct used oil analysis comparison of Mobil 1 vs AMSOIL in my 2006 CTS-V daily driver. I use the AMSOIL 0w30 and an EAO32 filter in my CTS-V, both of which are what I'd recommend in a daily driver C5 Z06 ...Royal Purple improves cold-weather fluidity and lubricity, ensuring smooth auto gear operation even in sub-zero conditions. This feature makes it an ideal choice for use in cold climates. Conversely, AMSOIL gear oil enhances fuel economy by improving cold-temperature fluidity and reducing energy lost to friction.Here is a link to a previous discussion on royal purple. While there are benefits to Royal Purple, Royal purple doesn't offer extended drain intervals, fewer visits to your mechanic, better performance, better MPG, emit cleaner exhaust. Not only that but AMSOIL backs that up with a warranty.The Mobil 1 synthetic motor oil is designed to keep engines running at their best. It’s a high-performance, low-viscosity oil that provides superior protection against engine wear and deposits. And it’s formulated with an advanced additive system that helps prevent fuel dilution for increased power and performance.Nov 11, 2016 · AMSOIL Signature Series 5W-30 Synthetic Motor Oil delivers 3 to 4 times the deposit fighting power of the high-end offerings from Mobil 1 and Royal Purple. Imagine how budget-priced engine oils might perform in this test? If you have a turbo-charged engine, do not cheap out on motor oil.We did a test at -40 between all of these oils let me know what you think in the comments and if we missed a brand you think we should testFor instance, comparing the life of the oil, AMSOIL oil provides around 25,000 miles before being drained while Mobil 1 and Royal Purple provide a durability of 15,000 miles and 12,000 miles respectively. However, as compared to the other oils, AMSOIL is also the most expensive one.1353 posts · Joined 2010. #11 · Nov 4, 2010. I'll have to check into the J2360 spec. Mobil1 and Valvoline both are $10, which is what Amsoil Severe Gear 75W90 goes for. Redline is only $11 or $12 which is Group V. It's really only the RP gear oil that's "designer" priced.The Ams was $11+ and the RP was $13+ per qt. I just changed the ATF in the Focus yesterday and M1 ATF was $9+ per qt. Synthetic ATFs are goin throu the roof. Unless you're doing 50K miles a year you're gonna go at least 1-2 years before you run up on 30K for your next trans fluid change.The best oils are PAO Group IV oils, which are Amsoil, Royal Purple, and Mobil 1. Amsoil doesn't cost any more either. People balk at the price, but when you extend oil change intervals, even without UOA, the cost is about the same as more frequent changes with standard oil, and less labour too.Last year, AMSOIL reformulated this fluid and slightly lowered its hot cSt viscosity from about 7.2 to 6.8 so as to make it suitable for GM's new Dexron VI specification. A nominal Dexron III fluid has a new hot viscosity of about 7.3, but shears rapidly down to about 5.0-5.5.Royal Purple vs. Amsoil Racing Oil. Jump to Latest Follow ... GC OW-30 and Mobil 1 0W-40 (both 'European' oils) are PAO synthetics and are very similar in quality.QUOTE] Tests have came back stating that the Mobil 1 0w-40 thins out very quickly back into a 30w. I have never used it, just referencing what I have read from tests.Testing Royal purple full synthetic and Mobil 1 motor oil plus super tech engine oil. find out the best engine oil for your car. a test to show what oil prov...AMSOIL is not cheap -– a gallon of 5W-30 is almost $90 on Amazon – but the company's high quality standards have earned it a 4.7 star rating and many positive reviews on that website, and over ... To ensure proper maintenance of your gear oil, it's