Well, I just got back from the local auto parts store and they are an Amsoil Dealer. I bought 6 qts. of Amsoil Severe Service Series 2000 0-30. I was reading the back and it says to change every 35k or 1 year. OMG, seriously? If that is the case I will be a happy man. I'm tired of changing my oil every 1.5 months. Well, I'm about to drop the MC thats in the truck now and pump it full of the new stuff along with an oversize M1-209 filter. Lets see how this goes.