Works OK for Amazon prime, Costco memberships, American Express, the local golf course (i buy buckets of balls in bulk need the practice) or any other of 1000 organizations offering discounts for membership just so we can have the opportunity to purchase their products (YEAH)? Hey if you don't want to use Amsoil go to Walmart, if you do the membership makes sense. I and several of my sales staff drive 50K plus a year. We share the membership get great shipping.Not knocking you at all since you don't make up the rules, but unless I was doing prep all the time and constantly replacing oils, lube, etc why would I pay $25/year just to be able to have the opportunity to use their products?