2024 Duramax Oil Capacity Litres. Here is some helpful specs from a different forum article that will cover gas trucks as well as the 6.6, its all useful information. You can order dexos2 oil online or get it from your dealer, but if you're no longer under warranty then i would recommend using a proper diesel oil like shell.

(1) if using e85 or m85 fuels, use amsoil of the. 6.6l duramax oil change guide, including motor oil requirements (viscosity charts and api categories), engine oil recommendations, oil change procedures, service intervals, and a list of relevant replacement parts.