A guy that I used to work with was a dealer for Amsoil. There are different ones that are for different change intervals. There's 7,500mi., 10kmi., and 35kmi. He uses the 35k in his V-10 Dodge Ram that he uses to pull a large trailer that is filled with Amsoil products and actually goes the full 35k before he changes the oil and his engine is still running strong.

I used to use the 7,500mi. oil in my Integra with good results. I'll probably use it in the S2000 when I hit 10k......just gotta find a distributor.

 

I use it as well, and LOVE IT. When I switched from Honda oil, my car did run a LOT smoother.

Amazing stuff, worth every penny. Buy it by the gallon, and save more money.