Red Line had their engineers work with top engine builders, CIK and WKA officials to ensure that their 4-Cycle Kart oil offers the ultimate engine protection and is legal for global competition. It is specifically formulated for the high demands of Kart racing and its unique engine requirements by helping to eliminate carbon build-up on valves, pistons, and combustion chambers. So save yourself and your engine from problems associated with budget oils; get some Red Line 4-Cycle Kart oil today.