Mercury 8M0081917 4-Stroke EFI Oil Change Kit 7590115 hp If you routinely change the oil in your ride, using the Mercury oil change kit to change your boats engine oil will be a snap. Mercury oil change kits contain industry-leading Mercury 25W-40 Marine Engine Oil. Over five years of engineering and development went into the exclusive Flagship Protection formula, which features a high-tech, advanced set of anti-wear additives that provide up to 33 better camshaft wear protection and the highest