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Originally Posted by Peter Gregg  Then we would never move ahead, I feel we are the deciding factor of what we do or add to our cars. Same for doctors, they aren't the last word over your body - you are.
I have read here that Mobil 1 has changed it formula. On the other hand I have read over here: http://www.lincolnsonline.com/tech/00105.html that Amsoil is good but adds more stuff to keep the viscosity up and it is the additives that really break down and not the oil - but he likes Mobil 1. But which Mobil 1, the old or the new??.
Personally I like and trusted the names Mobil 1 and Amsoil but now they both have "reasonable doubt" so it makes it hard to choose and causing me to look at Royal Purple. Ironically Royal Purple is a synthetic oil I would have not considered before. What is the world coming too 
Peter |
With all due respect Peter unless you hear that Mobil 1 changed it's formula from Mobil, GM or other known solid industry source, you can't be proof positive.
Bottom-line: If you want to spend your money on different oil for your car that's your perogative. To assume Mobil 1 doesn't meet or exceed high performance requirements because you heard it on a "Forum" is erroneous at best.
I've looked at Amsoil and consider it to be prohibitively expensive due to it's ridiculous need to market it thru multi level. I've heard conflicting thoughts, philosophies or feelings from several competent Corvette Tuners in Nort Texas about Royal Purple.
Simply put.
If there was a special golden formula tested and compared by a reputable entity, proving to enable these cars to run cooler, smoother and faster, I'd be running for it. At this point I'm sticking with what the MFG of this great car and their other high performance cars (Corvette) within model heirarchy have decided. Because they had the opportunity to do differently if they saw a benefit.
If it's good enough for Corvtte to use in their 24 Hr LeMans Rolex series cars, my cammed 08 Z06...I think my future daily driver CTS-V will be happy too.