Purpose and Specifications

STP Motor Doctor 444ml is an engine oil additive designed to restore and protect your engine's performance. This treatment works by fortifying your existing motor oil with extra additives that reduce wear, prevent oil leaks, and lower fuel consumption.

Key Benefits:

• Stops engine oil leaks and seepage from worn seals
• Reduces oil consumption between oil changes
• Protects against engine wear and friction
• Keeps engine parts cleaner by reducing deposits and sludge buildup
• Improves oil flow in cold temperatures while maintaining protection in heat
• Works with both petrol and diesel engines

How It Works: The additive contains viscosity improvers and anti-wear agents that thicken your oil slightly, helping it seal worn engine components and reduce leakage. It also includes detergents to combat carbon deposits and antioxidants to prevent oil breakdown.

Application Rate: One 444ml bottle treats approximately 4-5 quarts (3.8-4.7 liters) of engine oil.

When to Use / Replace?

Add this treatment:

• At every oil change, before or after adding fresh oil
• When you notice oil spots under your parked vehicle
• If your engine is consuming more oil than normal between services
• For engines with over 100,000 kilometers on the odometer

Replacement Schedule: Use one bottle per oil change cycle. Most vehicles require oil changes every 10,000-15,000 kilometers or every 6-12 months, depending on your driving conditions and vehicle manufacturer recommendations.

Storage: Keep in a cool, dry place. Shelf life is typically 3-5 years when stored properly.

Frequently Asked Questions

Q: Will STP Motor Doctor damage my modern engine?
A: No. This additive is formulated to be compatible with modern low-viscosity oils and tight engine tolerances. However, follow your vehicle manufacturer's recommended oil grade—do not use thicker oil than specified, as it can restrict flow in cold weather.

Q: How long does it take to see results?
A: You may notice reduced oil consumption and smoother engine operation within the first few hundred kilometers. Leak reduction typically becomes apparent after one complete oil change cycle (1-2 weeks of normal driving).

Q: Can I use this in both petrol and diesel engines?
A: Yes. STP Motor Doctor is formulated for use in all four-cycle petrol and diesel engines, including cars, trucks, and vans.