I have been using Amsoil for a dozen years or more now and I am in this same debate with myself over cost. I just dropped using there filter on this current oil change and went to the Fram ultra which is about half the price. There filters are way overpriced even at preferred pricing. I spent $58.37 at preferred pricing on 5 quarts of 5/30 ASL shipped end of last month. At doing 10k intervals either I go down and use XL which would still be 45.00 bucks or so, or go to wally world and spend 25-30 bucks and go the same distance. It is starting to sound better everyday.