Purpose and Specifications

Castrol Edge 5W-40 is a premium full synthetic engine oil in a convenient 4-liter pack, built for high-performance petrol and diesel engines, especially European models from BMW, Mercedes, VW, Renault, and Fiat. It flows easily like a thin 5W oil during cold starts down to -30°C for quick protection, then stays thick like 40-weight at normal running temps around 100°C to shield parts under extreme pressure from turbochargers or towing.

This oil delivers unbeatable strength against wear, keeping metal parts separated even at peak loads, while cutting sludge buildup for smoother response and maximum power. Approved to tough specs like ACEA C3, API SN/CF, MB 229.31/229.51, VW 505.00/505.01, and Renault RN0700/RN0710, it protects for the full drain interval up to 20,000 miles (32,000 km) or 12 months as per your owner's manual.

• Thrives in hot climates over 30°C or heavy use like towing
• Reduces engine deposits for better acceleration
• Proven in motorsport for endurance under high stress

When to Use / Replace?

Use Castrol Edge 5W-40 in modern high-pressure engines, older European cars with looser tolerances, or when towing/hauling in hot weather. Ideal for vehicles specced for 5W-40 over thinner oils like 5W-30. Replace every 10,000-20,000 miles (16,000-32,000 km) or 12 months, or sooner if you drive short trips, idle a lot, or see oil darkening early. Shelf life is 4-5 years unopened in cool, dry storage.

FAQ

Is this oil good for my turbo diesel? Yes, its superior film strength handles turbo heat and pressure, meeting VW, MB, and Renault approvals for diesels.

Can I switch from 5W-30 to 5W-40? Check your manual; it's great for hotter climates or worn engines needing thicker protection, but may slightly hurt fuel economy in cold areas.

How often should I change it? Follow your manual, typically 10,000-20,000 miles or yearly for full protection against wear and sludge.