Lucas Oil Synthetic Gear And Transmission Oil is a non-foaming, super slick, long-lasting lubricant designed especially for heavy duty or high performance applications where other gear lubricants just aren't good enough. It contains a special additive package that cushions gears and resists "squeezing out" under extreme pressure situations where other gear lubricants fail, and is specially designed to stand up to high temperatures without losing its lubricity. Heavy duty. High performance. Stands up to high temperatures.