What to do if you put the wrong fuel in your car: In one case, the scenario is most critical
That unpleasant feeling in your stomach when you realize you've taken the wrong 'nozzle' at the gas station happens even to the most careful. In a hurry, absent-mindedly, or while driving someone else's car, this mistake is surprisingly common.
TL;DR
- Do not start the engine if you realize you've used the wrong fuel.
- Gasoline in a diesel engine is very dangerous because it removes lubrication and causes metal-on-metal friction.
- Diesel in a gasoline engine is less damaging, usually causing clogs and poor running performance.
- If the engine wasn't started, costs involve towing and fuel removal, typically €100-€250.
- If the engine was started, cleaning the entire fuel system can cost €800-€2000, potentially over €5000 for severe damage.
- Immediately turn off the engine if you notice symptoms while driving and do not restart it.
- Professional fuel removal and system flushing takes 60-90 minutes.
- Damage from wrong fuel is usually not covered by warranty or standard insurance.