Lucas 75/90 Synthetic Gear Oil is a 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 insures less gear rattle and longer bearing life due to better lubrication. Excellent for use in limited slip differentials. This product is designed to stand up to high temperatures without losing its lubricity. A high performance, minimal drag gear oil for the serious racer. This one-of-a-kind formulation is blended with special lubricity and anti-wear agents. Comes in a one quart bottle.