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Amsoil is a proven product, and there are plenty of people with over 100k and no oil changes...oil analysis shows good. Amsoil has a very good warranty on their product, and has had so for over 30 years, to the best of my knowledge. Probably trillions of miles...and NO claims. If you can't believe their track record...you're not going to believe anything.



The oil may last longer than 25k, but the additives are the issue. They may last 25k under ideal conditions, but that would be a stretch even in that case. As I said before, they use the same additives as everyone else.

"If you are flammable and have legs, you are never blocking a fire exit" -Mitch Hedberg