it has a splash oil system, use gm supercharger oil, its the same stuff just cheaper. Its to the right side of the snout and is an small screw, you need and allen wrench to unscrew it, it takes 8 oz. you can use a turkey baster to get the oil out of it, and then refill...recommendation is every 60k miles if i remember correctly...if you shine a light down there you can see how full it is.