Personally, I have been happy with Amsoil products, so no need to try another right now. I also look for the "Made in U.S.A." label. In 1987 I bought a brand new Ford Ranger pickup and had so many problems with it that I haven't bought another Ford since. The point I'm trying to make is that we have lots of choices, so word of mouth can really hurt a product if they false advertise or sell a product that misleads the consumer.