Purpose and Specifications

Castrol GTX 10W40 A3/B4 is a premium engine oil designed to keep your engine clean and running smoothly for years. The 10W40 viscosity rating means it flows easily when your engine is cold (winter protection) and maintains a protective film at high temperatures (summer protection), making it suitable for year-round driving in most climates.

This oil meets strict international standards including ACEA A3/B4, API SL/CF, and approvals from major manufacturers like Mercedes-Benz (MB 229.1), Volkswagen (VW 501.01 and 505.00), and Fiat (9.55535-D2). These certifications guarantee the oil performs reliably in both gasoline and diesel engines.

Key Benefits

• Superior Sludge Control: The 3X-Clean formula removes existing engine sludge and prevents new buildup, keeping your engine 35% cleaner than industry standards. This means better oil circulation and reduced wear on engine parts.
• Extended Engine Life: Premium synthetic base oils and anti-wear additives protect critical engine components, helping your engine last longer and perform better.
• Thermal Protection: Resists breakdown at high temperatures and maintains viscosity stability, ensuring consistent protection whether you're driving in city traffic or on the highway.
• Reduced Oil Consumption: Helps minimize oil loss through burning or leakage, saving you money between oil changes.

When to Use / Replace?

Oil Change Intervals: Follow your vehicle manufacturer's recommended service schedule, typically every 10,000 to 15,000 kilometers or every 6 to 12 months, whichever comes first. Check your owner's manual for your specific vehicle.

Operating Temperature Range: This oil performs reliably between -25°C (cold start protection) and 100°C (high-temperature stability), covering normal driving conditions in most regions.

Shelf Life: Store unopened containers in a cool, dry place. Properly stored oil remains effective for several years before opening.

When to Replace: Change your oil if it appears dark or dirty, if your engine warning light activates, or if you notice increased engine noise or reduced performance.

Frequently Asked Questions

Q: Can I use Castrol GTX 10W40 in both petrol and diesel engines?
A: Yes. This oil is approved for both gasoline and diesel engines, including turbocharged models, as long as your vehicle manufacturer recommends ACEA A3/B4 specification.

Q: Is this oil suitable for older vehicles?
A: Castrol GTX has been trusted for over 50 years and is designed for all car types, including classic and older models. Always verify your vehicle's oil specification in the owner's manual before use.

Q: What does the 10W40 rating mean for my driving?
A: The 10W means the oil flows easily at -25°C for reliable cold starts in winter. The 40 rating ensures the oil stays thick enough at 100°C to protect your engine during normal driving. This makes 10W40 a versatile choice for most climates and driving conditions.