Designed especially for heavy duty or high performance applications where regular gear lubricants just aren't good enough, It contains a special additive package that cushions gears and resists "squeezing out" under extreme pressure situations, Specifically designed to stand up to high temperatures without losing its lubricity, Ideal for use in limited slip differentials, Has a 75W90 weight and is sold in easy-to-handle four 1-gallon bottles.