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  5. 15W-40

15w-40

If your car needs a 15W-40 engine oil Castrol offers a range of options that flow like a 15 Weight oil when the engine is cold and a 40 Weight oil when up to normal operating temperature.

Choose the best 15W-40 oil for your engine

Castrol offers a broad range of 15W-40 engine oils, including  synthetic technology and conventional oils, meeting the needs of both drivers and vehicle manufacturers. 

 

Castrol MAGNATEC is a synthetic technology oil 15W-40 that offers superior wear protection from the start and during warm up. Castrol GTX 15W-40 Double-Action formula has been engineered to clean away old sludge while preventing new sludge formation and has the ability to extend your engine's life in a variety of applications and duty cycles.

GTX 15W-40

GTX 15W-40

GTX 15W-40 A3/B3

GTX 15W-40 A3/B3

Castrol MAGNATEC 15W-40

Castrol MAGNATEC 15W-40 is uniquely formulated to provide instant protection from the moment of start.