It is pretty easy to drain and fill. It has a drain plug but does not have a dipstick. It is filled through the breather tube and when you have a CAI, like I do, it can take some maneuvering to get the breather tube cap back on. There is a level plug in the driver's wheel well. I usually get about 4-4.5 quarts out. Total capacity is about 9.5 quarts according to the manual.