Red line 75W90 is a hugely popular synthetic gear oil recommended for use in rear differentials and is suitable for both road and competition applications. Friction modifiers have been added to the oil making it suitable for clutch plate type LSD's in both road and competition cars.The most popular differential oil from Red lineSuitable for road or competition carsIncludes friction modifiers making it ideal for vehicles with plate type LSD'sSuitable replacement for applications requiring an 80W90 or SAE 90 gear oilRed Line 75W90 gear oil is engineered to provide excellent lubrication under extreme conditions and to give the highest degree of protection and improvement of differential efficiency for better economy, longer drain intervals, and less wear.Red line 75W90 is not recommended for use in synchromesh gearboxes.Specifications: API GL-5Recommendations: API GL-5, and MT-1, MIL-L-210SE, SAE J2360, Chrysler spec MS-9763, AGIP ROTRA LSX 75W-90, BMW 83 22 9 407 768, BMW 83 22 9 407 803