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IT'S MORE THAN JUST OIL. IT'S LIQUID ENGINEERING.

  1. Home
  2. MOTOR OIL & FLUIDS
  3. ENGINE OILS
  4. MOTOR OIL VISCOSITY GRADES
  5. 20W-50

SAE 20w-50 Oil - Conventional & High Mileage

A SAE 20W-50 motor oil is typically used in older vehicles or in particularly warm climates. Castrol GTX 20W-50 has been specially formulated to help extend the life of your engine by keeping it free from sludge, even when operating in extremely high temperatures.

Car engine and oil next to text reading 20W-50

GETTING THE BEST 20W-50 OIL FOR YOUR VEHICLE

Whether you choose high mileage 20W-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.

 

What is 20W-50 oil used for?

  • 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 engine oil

Castrol GTX 20W-50 oil

Castrol GTX 20W-50 is specially engineered to prevent the harmful build-up of sludge, reduce oil deposits and provide daily protection for your engine.
Castrol GTX High Mileage 20W-50 engine oil

Castrol GTX High Mileage 20W-50 oil

Castrol® GTX® High Mileage™ 20W-50 - the #1 High Mileage brand - is a premium synthetic blend motor oil specifically formulated for vehicles with over 75,000 miles.