Best Oil For 2024 Duramax. The oil capacity of the 6.6 duramax engine is 10 quarts, including the oil filter. For more instructions on adding fluid or oil to your truck, see your l5p duramax owner’s manual.
Add fluid or oil if you are at or below the fill or minimum mark. Thats the same filter my 6.2 l on the 1500 uses.