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Castrol GTX High Mileage 10W-30 is the No. 1 consumer high-mileage brand of motor oil. It's a synthetic blend engine oil that helps extend the life of engines by protecting against sludge, wear and burn-off. Engineered with Phosphorous Replacement Technology, it also protects emission systems by replacing some of the phosphorous that can damage catalytic converters.

Product Features:

• Phosphorus Replacement Technology helps extend emission system life
• Superior dispersancy that fights sludge build up
• Exceptional oil burn-off protection exceeding industry standards(1)
• Seal conditioners to help reduce leaks
• Advanced additives that minimize engine wear
• Improved fuel economy (2)
• (1) Based on API and ACEA volatility specifications
• (2) In 5W-20, 5W-30 and 10W-30 grades versus industry specifications
• API SP/SN PLUS/SN/SM
• ILSAC GF-6