Linelube Semi Synthetic 75W-90 is a high-performance heavy-duty automotive gear oil. It offers higher levels of performance when compared to straight mineral oils whilst being compatible with mineral oils which enables it to be simply used as a replacement product on a drain and fill basis. For use in high performance manual transmissions, spiral bevel axles, high load drive axles, hypoid axles and steering units. The use of this product will often smooth and improve manual gear changes in previously “notchy” gear boxes