Castrol EDGE High Mileage 0W-20 Full Synthetic Motor Oil, 5 Quart — Protects Older Engines & Reduces Leaks

Castrol EDGE High Mileage 0W-20 is a full synthetic motor oil formulated for vehicles with 75,000+ miles to help reduce wear, control deposits, and protect the emission system.

Designed for engines that have seen heavy use, this 5-quart jug of Castrol EDGE High Mileage 0W-20 combines advanced synthetic base oils with a targeted additive package to address the typical issues aging engines face. Its phosphorus replacement approach helps protect catalytic converters, while specialized chemistry aims to limit leaks, burn-off, and power-robbing deposits so your high-mileage vehicle runs cleaner and smoother between services.

How does this oil protect older engines from wear?

The formulation boosts film strength and friction control to reduce timing and friction wear common in high-mileage engines. By maintaining a protective oil film across critical parts, it lowers metal-to-metal contact that accelerates component wear over time.

• Advanced synthetic base oils for stronger film strength
• Additives tuned for timing chain and friction wear reduction
• Helps maintain clearances and reduce long-term component stress

Will this oil help reduce leaks and oil consumption?

Yes — Castrol EDGE High Mileage 0W-20 contains agents that help condition seals and reduce the tendency for leaks and oil seepage in older engines. It also addresses oil burn-off by improving volatility control, which can lower top-up frequency.

• Seal-conditioning additives to reduce seepage
• Lower volatility to minimize oil burn-off at operating temperatures
• Helps maintain stable oil pressures and reduce frequent top-ups

How does the phosphorus replacement technology affect emissions systems?

This oil uses a phosphorus replacement strategy to lower the level of harmful phosphorus while still delivering wear protection. The reduced phosphorus content helps limit catalytic converter deposits and supports longer emission-system performance without sacrificing protection.

• Proprietary additives reduce phosphorus impact on catalysts
• Designed to protect catalytic converters and emission components
• Formulated to meet modern emission-related engine requirements

How often can I expect to change the oil?

Castrol specifies up to 15,000 miles between oil changes under suitable conditions, or one year, whichever comes first. Actual change intervals depend on driving habits, vehicle condition, and manufacturer recommendations, so check your owner's manual and service indicators.

• Up to 15,000 miles per Castrol guidance*
• One year maximum interval if mileage threshold isn’t reached
• Adjust frequency for severe service, towing, or extreme climates

Who is this for: This 5-quart container of Castrol EDGE High Mileage 0W-20 is aimed at drivers of gasoline vehicles with 75,000 miles or more who want a high-performance synthetic oil that targets common high-mileage concerns — wear, leaks, deposits, and emission-system compatibility. It’s appropriate for owners seeking extended drain capability while meeting API SP and ILSAC GF-6 standards and specific OEM requirements from Ford and Chrysler. Always follow your vehicle manufacturer’s viscosity and specifications when selecting motor oil.

Specifications & features:

• Phosphorus Replacement Technology helps extend emission-system life
• Reduces leaks, oil burn-off, and power-robbing deposits
• Up to 15,000 miles between oil changes* (or one year)
• Meets API SP/SN PLUS/SN/SM and ILSAC GF-6; meets Ford and Chrysler engine test requirements

*Actual interval depends on driving conditions and vehicle recommendations.