Amsoil... Amway... Coincidence? I think not.

I prefer a product I can walk into a store and buy. Ordering online or through a "local distributor" working out of his house isn't confidence inspiring. But that doesn't necessarily mean that the products suck.

I've never used Amsoil fluids, but I did put one of their Ea high flow panel filters on my last car, and I couldn't tell any difference against the stock filter.