Quicksilver oil change kits contain industry-leading Quicksilver 25W-40 Marine Engine Oil. Over five years of engineering and development went into the exclusive Flagship Protection formula which features a hightech,advanced set of anti-wear additives that provide up to 33% better camshaft wear protection and the highest levels of corrosion and oxidation protection. Designed to maintain engine reliability and performance, Quicksilver 25W-40 Marine Engine Oil has been proven to hold its viscosity ratings longer in industry wear testing than other oils on the market. Quicksilver Oil, combined with a genuine Quicksilver Oil Filter team up to provide the highest degree of protection one can get on the water.Quicksilvers convenient oil change kits make it easy for customers to change their oil. Each kit contains all the items needed to change oil in select Mercury FourStroke Outboards:25W-40 Marine Engine Oil featuring flagship protectionOil filterDrain plug sealDrip tray (where applicable)Complete instructions printed right on the box