Approximate Cost of Repairing a Diesel Car Filled with Petrol by Mistake

Putting petrol in a diesel car is a common mistake, and the repair cost depends on how quickly you act. If you start the engine, petrol can damage the fuel system, requiring extensive repairs costing £1,500–£5,000. If caught before starting, draining the tank costs £200–£500.

Diesel engines rely on fuel for lubrication, while petrol acts as a solvent, stripping lubrication and causing friction. Key components at risk include the fuel pump, injectors, and filters. Modern high-pressure diesel systems (common in cars like the Ford Focus or Vauxhall Corsa) are especially vulnerable.

Steps to take if you misfuel:

1. Do not start the engine or turn the ignition on.
2. Call a recovery service for draining and flushing.
3. If driven, expect a full system inspection and potential part replacements.

Cost factors:

• Draining the tank: £200–£500.
• Replacing fuel filters and cleaning lines: £100–£300.
• Fuel pump or injector replacement: £1,000–£3,500.
• Labour rates vary by garage.

Prevention is cheaper—double-check the fuel nozzle before filling. Some insurers offer misfuelling cover, so check your policy.

Full Summary

Dear, the correct procedure for dealing with petrol being mistakenly added to a diesel engine is as follows: Upon realising petrol has been added to the diesel engine, immediately stop refuelling and do not start the engine. Then, after completely draining the petrol from the vehicle, refill with diesel. Generally, if petrol has been added by mistake, the diesel engine may still start but will exhibit insufficient power, rough operation, significant vibration, reduced speed, increased noise, and will be unable to function normally. This may even cause damage to the diesel engine.

Consultation Record · Response Dated 12/02/2023

Approximate Cost of Repairing a Diesel Car Filled with Petrol by Mistake

Hello dear, I'm very pleased to answer your question regarding the approximate cost of repairing a diesel car filled with petrol by mistake. After researching for you, the cost is approximately £300. If a petrol has been added to a diesel car by mistake, the repair method involves completely draining the petrol from the diesel car. In this case, the car owner only needs to visit a local garage, with the cost being around £200-£300. I hope my answer is helpful to you. Wishing you good health and a pleasant mood~

Dear, the correct procedure for dealing with petrol being mistakenly added to a diesel engine is as follows: Upon realising petrol has been added to the diesel engine, immediately stop refuelling and do not start the engine. Then, after completely draining the petrol from the vehicle, refill with diesel. Generally, if petrol has been added by mistake, the diesel engine may still start but will exhibit insufficient power, rough operation, significant vibration, reduced speed, increased noise, and will be unable to function normally. This may even cause damage to the diesel engine.

I drove about ten miles, experiencing vibrations, white smoke, and a strange smell. Could this damage the engine?

Dear, this likely won't cause damage, but it's advisable to have the engine's fuel injectors inspected and addressed promptly.

Hello dear, I'm very pleased to answer your question regarding the approximate cost of repairing a diesel car filled with petrol by mistake. After researching for you, the cost is approximately £300. If a petrol has been added to a diesel car by mistake, the repair method involves completely draining the petrol from the diesel car. In this case, the car owner only needs to visit a local garage, with the cost being around £200-£300. I hope my answer is helpful to you. Wishing you good health and a pleasant mood~

Dear, the correct procedure for dealing with petrol being mistakenly added to a diesel engine is as follows: Upon realising petrol has been added to the diesel engine, immediately stop refuelling and do not start the engine. Then, after completely draining the petrol from the vehicle, refill with diesel. Generally, if petrol has been added by mistake, the diesel engine may still start but will exhibit insufficient power, rough operation, significant vibration, reduced speed, increased noise, and will be unable to function normally. This may even cause damage to the diesel engine.

I drove about ten miles, experiencing vibrations, white smoke, and a strange smell. Could this damage the engine?

Dear, this likely won't cause damage, but it's advisable to have the engine's fuel injectors inspected and addressed promptly.