2024 6.6 Duramax Engine Oil Capacity. Duramax 6.6 fluid capacity & torq specs lb7/lly/lbz/lmm. Here is some helpful specs from a different forum article that will cover gas trucks as well.

2 of mine run delo 5w40 year round and the newest one i’m trying the ultra low ash delo 600 adf 15w40. Keep an eye on your air filter and change it as needed.