What to Do if You Put Gas in a Diesel Engine


What to Do if You Put Gas in a Diesel Engine

Putting gas in a diesel engine is a common mistake that can lead to serious damage if not addressed promptly. If you find yourself in this situation, don’t panic. Here are the steps you should take to minimize the potential damage:

1. Do not start the engine: Starting the engine will circulate the gas throughout the system and increase the risk of damage. Turn off the ignition immediately to prevent further complications.

2. Call for professional help: Contact a mechanic or roadside assistance service to get immediate guidance on what to do next. They will have the expertise to handle the situation correctly.

3. Drain the fuel tank: The most effective solution is to completely drain the fuel tank. This will remove the contaminated fuel and prevent it from causing further harm. However, this should be done by a professional to avoid any mishaps.

4. Flush the fuel system: After draining the tank, the fuel lines and filters should be flushed. This will help remove any traces of gas and ensure the system is clean and ready for diesel fuel.

5. Replace fuel filters: Gasoline can damage diesel fuel filters, so it’s essential to replace them after the incident. This will prevent any residual contaminants from entering the engine and causing problems.

6. Refill with diesel: Once the fuel system is thoroughly cleaned and the filters replaced, refill the tank with diesel. This will ensure the engine receives the correct fuel and minimize any lasting effects.

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7. Test and monitor: After the repairs, it’s important to test the engine and monitor its performance. If you notice any unusual sounds or behaviors, consult with a mechanic to address any remaining issues.


1. Can putting gas in a diesel engine ruin it?
Yes, gasoline can cause serious damage to a diesel engine if not addressed promptly.

2. How long can a diesel engine run on gasoline?
Running a diesel engine on gasoline can cause immediate damage. It’s crucial to turn off the engine as soon as the mistake is realized.

3. Can I fix the problem myself?
While it’s possible to address minor cases, it is recommended to seek professional help to avoid further complications.

4. How much will the repair cost?
The cost of repair will depend on the extent of the damage. It can range from a simple fuel drain to more complex repairs.

5. Is it covered by insurance?
Some insurance policies may cover the damage caused by misfuelling, but it’s best to check with your provider.

6. Can I prevent this mistake in the future?
Using caution at the pump, double-checking the nozzle, and being aware of the vehicle’s fuel requirements can help prevent this mistake.

7. Will the engine be the same after the incident?
With proper repairs and maintenance, the engine should return to normal functionality. However, it’s essential to monitor its performance for any signs of lingering damage.

Remember, putting gas in a diesel engine is a common error, but taking quick action and seeking professional assistance can help minimize the potential damage and get your engine back on track.

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