Originally Posted by xsperf
i dont have any bases to argue agaisnt you, but just remember than you are comparing 3000 mile old mobil 1 to brand new 0 mile amsoil, but either way, glad you like it!
Yea i understand this.. but the way i see it is the M1 is supposed to last 15K miles with zero change in protection and peroformance.. it obviously does not.
Theoretically i should not have to change my oil for 25,000 miles, amsoil guarantee's the 5w-30 for that period of time and the 0w-30 for 37,000 miles.
Yes, that is correct^^.
I bought the oil from a dealer in my area, the dude who sells it was a really cool guy, he had a mopar hotrod that he had not changed the oil on on 7 years, dont think it was some hunk of junk either, it was a show winning peice, immaculate in everyway. Amsoil actuallt makes an oil filter/testing system for different applications.. Ie: they have a dual filter system and collection tank that they have intervals of replacement on. After a certain number of miles the collection tank its removed and sent into amsoil for a full oil analysis, depending on what is shown the oil is either kept for more use or replaced. The guy that i bought the oil from had this system on his hotrod, and he said that the oil was the same on a molecular level as it was almost 7 years ago.