Put a Small Amount of Wrong Fuel in Your Car?
Realized your mistake after only adding 1, 2, or 5 liters of the wrong fuel? Do not turn the key. Even small amounts of contaminated fuel can damage modern high-pressure engine components.
Does a Small Amount of Wrong Fuel Matter?
Many drivers wonder if adding a tiny amount of petrol to a diesel tank (or vice versa) can be ignored by simply topping off with the correct fuel. Here is what happens inside your vehicle:
Petrol in Diesel (Even Small Amounts)
Diesel fuel acts as a lubricant for the high-pressure fuel pump. Petrol acts as a solvent. Even a small percentage of petrol lowers the flashpoint of diesel and strips lubrication, creating microscopic metal filings that ruin the pump and clog fuel injectors on-site.
Diesel in Petrol
Diesel is heavier and oily compared to petrol. Even a small amount of diesel will coat your spark plugs, foul the oxygen sensors, and cause misfires, heavy smoke, or engine stalling roadside.
Can You Just "Fill It To The Top"?
On older pre-2000 diesel engines, small amounts of petrol were sometimes diluted. On modern engines (Euro 5/6, Common Rail, DPF-equipped), diluting fuel is a massive risk that often leads to thousands in repair bills.
What To Do Right Now
Hang up the pump nozzle immediately, regardless of how few liters went in.
Do not turn the key to accessory mode or start the engine, as this activates the electric lift pump.
Speak directly to our local technician to assess your vehicle make, engine type, and exact mix ratio.
If required, we deploy our mobile unit on-site to extract the fuel cleanly and safely.
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