yeah, the ams-oil really cleans out the engine. I think my truck runs smoother, sounds more smooth, everything. It is the greatest. I also used ams-oil tranny fluid when i rebuilt that.
In another vehicle I have, we have been running ams-oil in it since 40K miles, it is currently over 218k origional miles...everything origional and this is a 4cylinder, gasoline engine, runs like a champ! but the best part is to see the inside of the engine block, it literally looks BETTER than new. where as most engines of that use are totally black inside, this one is shiny as ever. I'll post a pic later, I have to take it still though.
The only negative thing about this kind of oil is the cost, but for the engine life it gives I think that it is worth it!