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Castrol GTX High Mileage motor oil is the leading consumer high-mileage brand. You won't need to worry about using a high mileage oil or synthetic because this is both. It's asynthetic blend engine oilthat helps extend the life of your engine by protecting against sludge, wear and burn-off and also liquid engineered to protect your emission system. One of the leading causes of 'check engine' lights coming on in high mileage cars is actually catalytic converter failure, which can be caused by phosphorous in engine oil. While phosphorous is present in all engine oils for its ability to reduce wear, it is effectively poisonous to catalytic converters. CastrolGTX High Mileage Motor Oil is liquid engineered with Phosphorous Replacement Technology to replace some of the phosphorous with an advanced additive that maintains robust wear protection. When you want to extend the life of your high mileage engine and emission system and find out how many miles you can go on a high-mileage oil,there is no better choice than CastrolGTX High Mileage Motor Oil.

Product Features:

• Phosphorus replacement technology to help extend the life of the emission system
• Superior dispersancy that fights sludge build up
• Exceptional oil burn-off protection exceeding industry standards (based on api and acea volatility specifications)
• Improved fuel economy (in 5w-20, 5w-30 and 10w-30 grades versus industry specifications)
• Part synthetic oil: GTX High Mileage Engine Oil is a part synthetic oil that provides extra protection for older vehicles, making it an ideal choice for high mileage engines.
• Protects against sludge, wear and burn-off: This synthetic blend engine oil helps extend the life of your engine by protecting against sludge, wear and burn-off, ensuring that your engine runs smoothly for longer.