STP Engine Stop Leak Petrol, and Diesel Improved Concentrated (300 ml) is an engine oil additive designed to help reduce or stop minor motor oil leaks and improve the overall performance of your engine’s oil system without the need for immediate mechanical repairs.

STP Engine Stop Leak contains a specially formulated agent that targets seals and gaskets within the engine that have shrunk, hardened, or cracked due to normal engine heat and use. This special agent works to rejuvenate and condition polymer seals and gaskets, helping to restore them closer to their original size and flexibility, which can reduce or help stop minor oil leaks.

Key Features:

• Renewal of seals and gaskets: Helps restore the flexibility and sealing ability of rubber and polymer components that may have deteriorated from heat and age.

• Stops minor oil leaks: Designed to address small leaks that occur at gaskets and seals, potentially delaying the need for costly repairs.

• Enhances oil protection: Improves the protective qualities of the engine’s existing oil.

• Safe for engine systems: Formulated to contain no solids that could clog oil filters or restrict flow; safe with regular and synthetic motor oils, and won’t harm oxygen sensors or catalytic converters.

• Compatible: Works in both petrol and diesel engines.

Usage Notes:

Add the full 300 ml bottle to your engine oil (typically treating about 3–5 L of oil) and let the engine run for about 10–15 minutes. At the next oil change interval, drain as normal. Persistent major leaks may still require proper mechanical repair