<strong>Yahoo Message Number: 17607</strong>Our C9 holds 32 quarts with oil change and never uses any........ <br/>Cat recommneds 34 quarts but when I did an oil change I used 32 quarts and the level on the dipstick shows one inch above the full mark that is where it was when we took deliverey of the coach. <br/>I think one inch above full is the correct level because the engine always runs cool...