Master Pro GL-4 Gear Oil is formulated to meet API GL-4 service requirements. It is blended from selected base stocks and high-performance additives to provide resistance to the formation of varnish deposits and to assure long trouble-free operation. Master Pro GL-4 Gear Oil provides excellent thermal stability and exceeds certain manufacturers’ requirements for differential and transmission fluid.

• Extreme Pressure additives minimize wear
• Extends the useful life of power train components
• Resists varnish and sludge