Torco T-4MXR 15W-40 4-Cycle Oil is a blend of highly refined synthetic and petroleum base oils combined with Torcos race proven additives. Designed specifically for modern high performance off-road four-stroke racing engines, T-4MXR provides smooth, positive clutch engagement, maximum engine protection and extreme pressure protection for integrated transmissions. T-4MXR features improved shear stability and provides the highest degree of anti-friction and anti-wear for long term protection. T-4MXR is a non-friction modified formula, making it safe for both integrated and separate transmission systems.