Ponch, try Autozone, O' Reilly, NAPA, Wal-Mart, Farm and Fleet and surrounding truck stops as applicable in your area. If you still can't find it, you can also use Shell Rotella T, Chevron Delo 400, and Supertech 15w40 which is made by neither Exxon-Mobil or Shell Oil Products United States - Pennzoil and Quakerstate formulas.