Castrol EDGE High Mileage 5W-20 Full Synthetic Motor Oil, 5 qt — Advanced wear protection & deposit control

Castrol EDGE High Mileage 5W-20 is a full synthetic motor oil formulated to protect and refresh engines with 75,000+ miles while helping reduce emissions-system wear.

Built for aging engines, this advanced synthetic oil combines modern base oils and a targeted additive package to address common high-mileage issues such as leaks, oil consumption, and deposit formation. It also uses a lower-phosphorus approach to be gentler on catalytic converters while still meeting current industry performance standards. The result is a product intended to extend engine life and maintain performance in vehicles that have accumulated significant mileage.

How does this oil help older engines perform better?

The formulation focuses on reducing friction and controlling sludge and varnish that build up over many miles. By lowering internal friction and keeping critical parts cleaner, the oil helps preserve engine responsiveness and efficiency.

• Advanced synthetic base stocks reduce wear between moving parts
• Deposit-fighting additives help keep rings and valve train cleaner
• Friction-reduction chemistry supports smoother engine operation

Will it protect my vehicle’s emission control components?

This oil uses a phosphorus-replacement strategy designed to reduce the burden on emission-control hardware. That means it helps limit the phosphorus and other elements that can harm catalytic converters while still providing necessary anti-wear performance.

• Phosphorus Replacement Technology cuts harmful phosphorus inputs
• Formulation aims to reduce long-term catalyst and sensor stress
• Maintains compliance with modern emission-related specifications

How often can I change the oil when using this product?

Castrol specifies an extended drain capability under appropriate conditions, allowing longer intervals between oil changes for many users. Always follow your vehicle manufacturer's guidance and local driving conditions when deciding oil change frequency.

• Up to 15,000 miles between oil changes under recommended conditions*
• Or one year, whichever comes first
• Check owner’s manual and service habits before extending drain intervals

What certifications and vehicle requirements does it meet?

This 5W-20 oil conforms to current industry and manufacturer test requirements, making it suitable for a wide range of gasoline engines that call for this viscosity. It meets multiple API, ILSAC, and manufacturer specifications to ensure broad compatibility.

• Meets API SP, SN PLUS, SN, SM and ILSAC GF-6 performance levels
• Meets engine test requirements for Chrysler MS 6395
• Suitable where Ford WSS-M2C945-B1 or WSS-M2C960-A1 are specified

Who is this for: Castrol EDGE High Mileage 5W-20 is aimed at owners of gasoline-powered cars and light trucks with 75,000 miles or more who want a synthetic oil that addresses high-mileage concerns—leaks, oil consumption, deposits, and emissions-system longevity. It's appropriate for drivers seeking an oil that meets modern performance standards while offering extended drain potential under correct service conditions. If your manufacturer's recommended viscosity is 5W-20 and you want an advanced synthetic specifically tuned for older engines, this product is a strong candidate.

Note: Always confirm compatibility with your vehicle’s owner manual before changing oil types or drain intervals. Product claims and service intervals can vary by driving habits, climate, and vehicle condition.