Helps Reduce Leaks

Minor oil seepage becomes increasingly common as vehicles accumulate mileage.

Engine seals endure thousands of heating and cooling cycles over their lifetime. Eventually, aging materials can lose some of their original flexibility and sealing capability.

Castrol EDGE High Mileage is formulated to help reduce leaks in higher-mileage engines.

That doesn’t mean pouring it into the crankcase will magically repair a torn rear main seal.

Oil is good.

Sorcery remains backordered.

But for the normal effects of seal aging, a purpose-built high-mileage formulation can provide meaningful advantages over an oil without those specialized characteristics.

Helps Reduce Oil Burn-Off

Higher-mileage engines may also begin consuming more oil.

Castrol EDGE High Mileage is formulated to help reduce oil burn-off, an increasingly useful characteristic as piston rings, valve seals and other internal components accumulate wear.

Reducing oil consumption helps maintain the proper lubricant level between services.

That’s important because even premium full-synthetic oil can’t provide much protection after the dipstick starts coming out dry.

Owners of higher-mileage vehicles should still check their oil level regularly regardless of the oil-change interval.

Fights Power-Robbing Deposits

Engine deposits aren’t merely ugly.

Deposits can interfere with oil circulation and contribute to poor operation of components relying on small lubrication passages and hydraulic control.

Castrol EDGE High Mileage 5W-20 is engineered to help reduce power-robbing deposits while providing sludge control for aging engines.

Keeping internal components cleaner can help preserve engine performance as mileage continues accumulating.

If you want a deeper look at how sludge develops and what happens once deposits start causing problems, read our My Pro Street guide to Engine Oil Sludge Causes and How to Fix It.

Phosphorus Replacement Technology

One of Castrol EDGE High Mileage’s standout features is its Phosphorus Replacement Technology.

Phosphorus has traditionally played an important role in motor-oil anti-wear chemistry. However, phosphorus entering the exhaust system through oil consumption can negatively affect catalytic converters over time.

That’s particularly relevant in older engines that may consume more oil than they did when new.

Castrol’s proprietary technology is designed to reduce harmful phosphorus while continuing to provide important engine protection.

The goal is to help extend the life of the vehicle’s emissions system and catalytic converter while protecting the engine itself.

Helps Protect Expensive Catalytic Converters

A catalytic converter isn’t something most owners think about until the check-engine light appears.

Then everybody suddenly becomes very interested.

Castrol EDGE High Mileage’s emissions-focused formulation makes particular sense for older vehicles where oil consumption may allow lubricant additives to reach the exhaust system.

Helping protect the catalytic converter can contribute to keeping a higher-mileage vehicle both mechanically healthy and emissions compliant.

For drivers trying to get another 50,000 or 100,000 miles from a dependable vehicle, that’s a benefit worth considering.

Up to 15,000 Miles Between Oil Changes

Castrol advertises up to 15,000 miles or one year of protection, whichever comes first, for EDGE High Mileage.*

Extended protection can be particularly convenient for drivers who accumulate substantial annual mileage.

However, that doesn’t automatically make 15,000 miles the correct service interval for every vehicle.

Oil-change requirements can vary based on:

• Vehicle manufacturer recommendations
• Engine design
• Driving conditions
• Severe-service operation
• Oil-filter capability
• Oil-life monitoring systems
• Engine condition
• Warranty requirements

Always follow the appropriate service requirements for your specific vehicle.

A bottle saying 15,000 miles isn’t permission to challenge your owner’s manual to a duel.

SAE 5W-20 Performance

Castrol EDGE High Mileage uses an SAE 5W-20 viscosity suitable for compatible engines designed around this grade.

The 5W winter rating provides the low-temperature characteristics needed for effective cold-start circulation, while the SAE 20 operating-temperature grade provides the viscosity characteristics required by compatible engines once they’re warm.

Don’t automatically switch an older engine to thicker oil simply because it has accumulated mileage.

If the manufacturer continues to specify 5W-20, a dedicated high-mileage 5W-20 formulation can provide age-focused protection while maintaining the intended viscosity.

Castrol EDGE High Mileage 5W-20 Specifications

Brand: Castrol
Product Line: EDGE High Mileage
Product Type: Advanced Full Synthetic Motor Oil
SAE Viscosity: 5W-20
Container Size: 5 Quarts
Recommended Vehicle Mileage: 75,000+ miles
API: SP / SN PLUS / SN / SM
ILSAC: GF-6
Chrysler: Meets engine-test requirements of MS-6395
Ford: Meets WSS-M2C945-B1
Ford: Meets WSS-M2C960-A1
Technology: Phosphorus Replacement Technology
Advertised Protection Interval: Up to 15,000 miles or one year*
Primary Focus: Advanced protection for higher-mileage engines

Ford WSS-M2C960-A1 and WSS-M2C945-B1

Castrol EDGE High Mileage 5W-20 meets Ford WSS-M2C945-B1 and WSS-M2C960-A1 requirements.

That makes this formulation relevant to compatible Ford-family applications requiring these specifications and SAE 5W-20 viscosity.

It also meets the engine-test requirements of Chrysler MS-6395.

Vehicle compatibility should always be determined by comparing the lubricant specifications against the exact requirements for your vehicle’s year, model and engine.

Matching the viscosity is only half the job.

Castrol EDGE High Mileage vs GTX High Mileage

Both product families target vehicles with more than 75,000 miles, but they’re aimed at different buyers and applications.

Castrol GTX High Mileage provides synthetic-blend protection focused on aging-engine concerns such as sludge, seals, wear and oil burn-off.

Castrol EDGE High Mileage steps up to an advanced full-synthetic formulation and provides extended protection for up to 15,000 miles or one year.*

That makes EDGE High Mileage particularly attractive to owners who want high-mileage-specific additives without giving up the advantages of a premium full synthetic.

Who Should Buy Castrol EDGE High Mileage 5W-20?

This oil is a strong choice for owners of compatible vehicles with more than 75,000 miles that continue to require SAE 5W-20.

It’s particularly well suited to:

• High-mileage daily drivers
• Vehicles with 75,000+ miles
• Higher-mileage Ford vehicles requiring compatible specifications
• Compatible Chrysler applications
• Cars experiencing minor age-related oil seepage
• Engines beginning to consume oil
• Owners concerned about deposits and sludge
• Vehicles where catalytic-converter protection is important
• Drivers wanting full-synthetic high-mileage protection
• Owners keeping vehicles well beyond 100,000 miles

Always confirm your vehicle’s required viscosity and specifications before ordering.

Don’t Retire a Good Engine Just Because the Odometer Has Six Digits

Modern engines can run for a very long time when they’re properly maintained.

Crossing 75,000 miles isn’t the end.

For plenty of cars, it’s barely halftime.

Castrol EDGE High Mileage 5W-20 Advanced Full Synthetic Motor Oil combines premium full-synthetic lubrication with protection specifically designed around aging-engine concerns.

It helps address leaks, oil burn-off, deposits, sludge, wear and emissions-system protection while offering Castrol’s advertised protection for up to 15,000 miles or one year.*

If your higher-mileage vehicle requires a compatible SAE 5W-20 lubricant, give it an oil designed to keep going right along with it.

Grab a 5-quart jug of Castrol EDGE High Mileage 5W-20 and keep adding miles.

*Up to 15,000 miles or one year, whichever comes first. Vehicle manufacturer service requirements, operating conditions and other applicable recommendations should always be followed.