Originally Posted by wstar

Be careful with how close you run to that H-mark. L<->H on the dipstick is a range. H is not the target. The ideal is somewhere in the middle (I usually shoot for about 2/3 up between L and H), and it's the holes rather than the letters that indicate the range marks. Check while parked on a perfectly level surface with the engine off for at least 10 minutes. If you end up overfilled, your oil will foam and not lubricate/cool as well.