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I will never use RP again in anything I drive. It seems to completely shear down to water in only a few thousand miles, making my valvetrain VERY noisy.
I just used amsoil for the first time and my car is virtually silent from under the hood. I used their "Signature Series" and will continue to use it unless something goes wrong. They have a preferred customer program for $20 a year that will save you tons of money. I got 14 botttles of SSO and it should have cost $140, but being a preferred customer I paid $100. Plus you save on everything they make.
AmsOil is the number 1 oil, especially for hi-po cars
Royal Purple is up there pretty close. Haven't heard too much about folks using the Red Line oil for their motors that much. but it is popular. With all the great oils out there, they still have their niche vehicle parts that they excel at.
Say, one may be better for the transmission than the other brand.
But generally, if you change oils at correct part manufacturers recommendations and stay with the type/grade intended, you'll be in great shape.
I use Mobil 1 myself for the engine, and use other brands of synthetics for every other lubricated part of the vehicle.
b-t-w where is that info on Mobil 1 gasoline engine oil not being a true synthetic anymore???
Correct, Mobil 1 used to be made primarily with a group IV base stock which is mandatory for any product to be called synthetic in any country except the US. In the US Group III base stock which is made from purified Pertoleum is all that is required to be called a Sythetic, which is what most Castrol Syntec oil is made from (German Made Syntec is the exception as it is made from GIV stock).
Group III base stocks are very good oils. Castrol GTX from 20 years ago used to be made with Group III base stock and it was the best performing "regular" oil available, but that changed when Syntec was introduced (same product and GTX used to be but different bottle)
Some True Group IV Sythetic oils are Redline (GIV and GV), Royal Purple, Amsoil, German Syntec and others
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Thats a negative these claims are in fact true (extended intervals). The 3m/3g's mi was true back in the day, but like most things technology catches up and improves life. These oils can in fact last 5,000+ easy without breaking a sweat. I run a synthetic blend (Motorcraft 10w30) and run it for 5,000, city and highway and plenty of spirited driving. The difference is I have proof it's working fine and holding up just fine (hell as you can see they want me to go 6,000 miles and check).The thing about the extended oil change intervals that are claimed... Im not buying it. If you want to take care of your vehicle, 3 months/ 3,000mi is the rule that should be followed. The way I see it, if your going to use synthetic oil, but then leave it in the engine for 10,000mi +,the oil has broken down and your losing all of the benifits of the synthetic so why bother.
Just my 2 pennies.
Mobil 1 for me. It is a true synthectic, They been in it longer than any
other company. Never had any issues yet. Good stuff IMO.