STP 300ml Oil Treatment Diesel

Product code: GST61300EN

In Stock

GBP new

£9.99

£8.33 ex. VAT

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STP Oil Treatment (Diesel) – 300ml

Part Number: GST61300EN

Take Note! Do not overfill. Not recommended for use in petrol engines. Not suitable for use in low SAPS oil.

STP® Oil Treatment for Diesel Engines provides added protection against heat and wear, helping oil maintain its lubricating properties for longer. It reduces friction and engine deposits, supporting smoother operation and extending engine life until the next oil change.

How It Helps

• Reduces engine wear
• Minimises friction in high-stress areas
• Provides extra protection against heat
• Helps reduce harmful engine deposits
• Lowers oil consumption

Usage Directions

• Warm the engine and switch off before adding product.
• Pour entire 300ml bottle into the oil filler.
• One bottle treats up to 6 litres of diesel oil (5% treat rate).
• Do not overfill – check oil level after use.

Usage Frequency: Use at or between oil changes

Product Characteristics

• Type: Diesel oil treatment / engine additive
• Volume: 300ml
• Treats: Up to 6 litres of diesel oil (5% rate)
• Compatibility: All diesel engines (not for petrol or low SAPS oil)
• Function: Reduces wear, friction, heat & deposits
• Usage: At or between oil changes

Also Available

▶ Fuel & Exhaust Treatments

• STP Petrol Treatment – 200ml
• STP Petrol Injector Cleaner – 200ml
• STP Diesel Treatment – 200ml
• STP DPF Cleaner – 200ml

▶ Oil Treatments

• STP Oil Treatment (Petrol) – 300ml
• STP Oil Treatment (Diesel) – 300ml
• STP Engine Flush – 450ml

▶ Spray Cleaners

• STP Carb Spray Cleaner – 500ml
• STP Heavy Duty Engine Degreaser – 500ml
• STP Power Steering Fluid – 350ml