Purpose and Specifications

Castrol GTX Ultraclean 10W-40 A3/B4 1L is a premium part-synthetic engine oil designed for gasoline and diesel engines. It delivers 50% superior sludge protection compared to industry standards, cleaning away old sludge while preventing new buildup from heat, contaminants, and short trips.

This oil meets ACEA A3/B4, API SN, MB-Approval 229.1, Renault RN 0700/RN 0710, VW 501 01/505 00, and Fiat 9.55535-D2/G2 specs. Key specs include kinematic viscosity at 100°C of 14.3 mm²/s, at 40°C of 97 mm²/s, viscosity index 151, pour point -39°C, and density 0.864 g/ml at 15°C. It protects in operating temps from -25°C to over 150°C high-heat conditions.

• Double-action formula: Removes existing engine sludge and blocks new deposits
• Thermal stability: Resists breakdown up to high engine temps
• Anti-wear additives: Extends engine life in modern vehicles

When to Use / Replace?

Use in cars requiring 10W-40 ACEA A3/B4 oil per your owner's manual. Ideal for older engines prone to sludge or high-mileage vehicles (over 100,000 km). Replace every 10,000-15,000 km or 12 months, whichever comes first, or sooner in severe conditions like frequent short trips or dusty roads. Shelf life is 5 years unopened.

FAQ

Is this oil suitable for my diesel car? Yes, if your manual specifies ACEA A3/B4 or API SN 10W-40; check approvals like VW 505 00 or MB 229.1.

Can it handle cold starts? Absolutely, with CCS viscosity of 6280 mPa.s at -25°C and pour point -39°C for reliable winter protection.

How does it extend engine life? Its formula keeps engines 50% cleaner by fighting sludge, reducing wear in vital oil ways.