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  5. 20W-50

Castrol GTX 20W-50

Castrol GTX 20W-50 has been specially formulated to help extend the life of your engine. Learn about the benefits of our 20W-50 engine oil here.

Getting the best 20W-50 oil for your vehicle

Whether you choose high mileage 25W-50 or conventional 20W-50 motor oil, they will both flow like a 20 Weight oil in cold weather, then with the viscosity of a 50 Weight oil once the engine is up to full temperature. Choose Castrol® GTX® 20W-50 to protect against sludge and Castrol® GTX® High Mileage for older vehicles with over 75,000 miles on the odometer.

 

Castrol® GTX® High Mileage 20W-50 is specially formulated for vehicles with over 75,000 miles. It contains Phosphorus Replacement Technology, which reduces the level of phosphorus and replaces it with a proprietary additive that preserves your emission system while maintaining robust wear protection. Castrol® GTX® 20W-50 is formulated to clean away existing sludge while preventing new sludge formation to help extend engine life. It is also liquid engineered to resist viscosity and thermal breakdown.

Castrol GTX 20W-50

Castrol GTX 20W-50 is engineered to extend the life of your engine and provides superior protection against oil burn-off, 60% better than tough industry volitality tests.