Just get a jug of 15w40 Diesel specific oil, doesn’t need to be synthetic. The common brand names are Shell Rotella, Chevron Delo, Mobil Delvac, Valvoline Premium Blue. There are other brands, they are all the same. I buy whatever is on sale.
All of these oils will be together on the shelf at any Autozone, O’Reilley’s, etc. Walmart has a good selection and the best prices. Good luck and post photos! If it’s gutless, something simple is wrong. Hopefully not the turbo, which is simple.
