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Is a Small Amount of Petrol in a Diesel Engine Harmful?

Learn why even a small amount of petrol in a diesel engine can cause serious damage and what to do if you mistakenly fuel your diesel vehicle with petrol.

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Video transcript

A small amount of petrol in a diesel engine can cause serious damage. Diesel engines rely on diesel fuel's lubrication properties, and even a little petrol can reduce this, leading to increased wear and potentially severe engine damage. If you realize you've filled up with petrol, do not start the engine and have the fuel tank drained by a professional immediately to prevent costly repairs.

Questions and answers

  1. What happens if I put petrol in a diesel engine?

    Petrol in a diesel engine reduces lubrication, which can cause increased wear and severe engine damage if the engine is started with contaminated fuel.

  2. Can a small amount of petrol damage a diesel engine?

    Yes, even a small amount of petrol can harm a diesel engine due to its lower lubrication properties compared to diesel fuel.

  3. What should I do if I accidentally fill my diesel car with petrol?

    Do not start the engine. Have the fuel tank drained immediately by a professional to avoid costly engine repairs.

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