This mineral based gear oil from Driven Racing Oil is ideal for classic competition or performance cars where a 80W90 GL4 oil is specified and is suitable for use in manual transmissions, transaxles and differentials.Ideal for classic motorsport or classic performance carsSuitable for manual transmission, transaxle or differential use (not suitable for plate type LSD's)Safe for all yellow metalsPrevents gear clashing and allows for proper gear synchronisationDriven racing Oil GL4 80W90 mineral gear oil is ideal for use in classic gearboxes where a synthetic GL4 oil proves too slippery for the synchros to mesh properly and is proven to work extremely well in the following transmissions: Muncie, T10, Super T10, Ford Toploader, Saginaw and Mopar 383.1 Quart (0.946 Litre) bottle