Tuopulan 5W-40 Diesel Engine Oil

Tuopulan 5W-40 Diesel Engine Oil is a premium 100% fully synthetic oil engineered for modern diesel engines. Available in 1L and 4L packs, it offers superior engine protection, high-temperature stability, and extended engine life, making it ideal for trucks, buses, heavy-duty machinery, and passenger diesel vehicles.

As a professional fully synthetic engine oil manufacturer, Tuopulan guarantees consistent quality, global compliance, and reliable supply for direct buyers.

🔹 Key Features & Technical Advantages

✅ 100% Fully Synthetic Formula

• Advanced synthetic base stocks ensure excellent thermal stability, low volatility, and consistent viscosity even under extreme temperatures.

• Reduces internal friction, supporting smoother engine operation and better fuel economy.

✅ API SP Diesel Engine Standard

• Meets the latest API SP specification, providing enhanced wear protection, LSPI prevention, oxidation resistance, and sludge control.

• Safe for engines with turbochargers, common rail injection, and emission systems.

✅ High-Temperature Stability & Load Protection

• Maintains oil film strength under heavy-duty conditions, long-distance highway driving, and high RPM operation.

• Protects pistons, bearings, and camshafts from thermal degradation.

✅ Excellent Cold Start Performance

• Flows quickly at low temperatures to ensure rapid lubrication, reducing wear in winter or cold climates.

✅ All-Weather Reliability

• Designed for year-round use, offering stable protection in both extreme hot summers and freezing winters.

✅ Extended Engine Life

• Advanced detergents and anti-corrosion additives minimize sludge and deposits, prolonging engine life and lowering long-term maintenance costs.

✅ Flexible Pack Options

• 1L bottles for top-ups

• 4L packs for full oil changes

• Perfect for both DIY enthusiasts and professional mechanics

🚗 Recommended Applications

• Diesel engines in passenger vehicles, trucks, buses, and heavy-duty machinery

• City driving with frequent stop-and-go traffic

• Highway and long-distance driving

• High-load, turbocharged, or common rail diesel engines

• Extreme cold or hot climate conditions

Always refer to your vehicle manufacturer’s specifications for optimal performance.

💪 Advantages Over Conventional Oils

• Vs. Mineral Oils: Better high-temp stability, reduced wear, cleaner engine, and longer oil change intervals

• Vs. Semi-Synthetic Oils: Superior oxidation resistance, full synthetic protection, and improved fuel economy

• Vs. Lower-Spec Diesel Oils: Meets API SP for modern engines with DPF, turbochargers, and advanced emission systems

🛠 How It Works

Tuopulan 5W-40 Diesel Engine Oil combines high-performance synthetic base oils and advanced additives to:

📌 Maintain optimal viscosity under extreme temperature and heavy load
📌 Reduce engine friction for smoother performance and lower fuel consumption
📌 Prevent sludge, deposits, and corrosion
📌 Protect turbochargers, high-performance diesel engines, and emission systems

✨ Frequently Asked Questions (FAQ)

Q1: Can I use 5W-40 in all diesel engines?
✅ Suitable for most modern diesel engines. Always confirm with your vehicle’s manual.

Q2: How does it improve fuel efficiency?
✅ Fully synthetic formula reduces internal friction, enhancing engine efficiency and lowering fuel consumption.

Q3: Can it handle cold starts?
✅ Yes. 5W-40 viscosity ensures rapid lubrication at low temperatures, reducing engine wear.

Q4: Is it safe for turbocharged diesel engines?
✅ Absolutely. Protects pistons, bearings, and turbochargers under high stress.

Q5: How often should I change this oil?
✅ Typically every 5,000–10,000 km, depending on driving conditions and manufacturer recommendations.

📍 Purchase & Manufacturer Information

Choose Tuopulan 5W-40 Diesel Engine Oil – 100% Full Synthetic, 1L/4L for:

• Superior diesel engine protection

• Extended engine life and reduced maintenance costs

• High-temperature stability and all-weather reliability

• Fuel efficiency improvement and emissions compliance

As a trusted fully synthetic engine oil manufacturer, Tuopulan provides direct supply, online customer support, and professional guidance. Contact our online customer service for purchase, bulk orders, or technical inquiries.