Put Petrol in a Diesel Car? Emergency Fuel Drain in Essex
If you have mistakenly filled your diesel car with petrol, do not turn on the ignition or start the engine.
Turning the key allows the petrol to travel from the tank into your fuel system, where it can cause catastrophic and expensive damage.
Diesel acts as a lubricant for your high-pressure fuel pump and injectors; petrol behaves as a solvent, stripping away this vital lubrication and causing metal components to grind together, generating fine metal shards that can ruin your entire engine.
If you've made this common mistake, stay calm—our specialist mobile Essex misfuelled car fixers operate 24/7 to drain the petrol, flush your fuel lines, and get you back on the road safely without a costly trip to a main dealer.
Rapid 24/7 Roadside Petrol Recovery Across Every Essex Town & Village
Our dedicated fuel drainage vehicles are equipped with specialist, commercial-grade pumping systems designed to safely evacuate every drop of petrol from your diesel tank right at the roadside or fuel pump.
We provide immediate emergency coverage across all major Essex hubs and commuter routes, including Southend-on-Sea, Colchester, Chelmsford, Basildon, Rayleigh, South Benfleet, Thundersley, Rochford, Hockley, Wickford, Braintree, Witham, Maldon, Burnham-on-Crouch, South Woodham Ferrers, Brentwood, Chipping Ongar, Epping, Waltham Abbey, Loughton, Chigwell, Buckhurst Hill, Harlow, Great Dunmow, Saffron Walden, Thaxted, Halstead, Clacton-on-Sea, Frinton-on-Sea, Walton-on-the-Naze, Harwich, Manningtree, Brightlingsea, Wivenhoe, Tiptree, West Thurrock, Grays, Tilbury, Stanford-le-Hope, Corringham, and South Ockendon.
Whether you are stranded on a busy forecourt off the A12 or stuck on a quiet rural lane, our mobile units also service every surrounding village and parish across the county. From Great Wakering, Hullbridge, Kelvedon, and Feering in the east, to Takeley, Stansted Mountfitchet, and The Rodings in the west, our certified technicians will arrive swiftly to perform a complete system flush, replenish your tank with fresh diesel, and prime your engine. Available day and night, we deliver a fast, hassle-free, and affordable mobile misfuel solution to protect your car and your wallet.
Petrol in diesel car symptoms
- Excessive/abnormal smoke (more excessive usual)
- Lack of power (slower than usual acceleration)
- Engine stalling/misfiring
- Struggling to start or not starting at all
- Unusual smell Petrol in Diesel give off distinctively different smells
- The engine management light illuminating
- Engine stopping altogether
Put petrol in diesel car?
Turning the key is the biggest mistake you can make, as even if you don’t actually start the engine, illuminating the dashboard lights could mean your fuel pump whirrs into life. It’s supposed to prime the engine with diesel before it starts, but instead could be sucking petrol up the fuel lines. This means they’ll need draining and flushing as well as the fuel tank. If you get as far as starting the engine, there’s a whole lot more that can go wrong besides.
Unleaded in diesel tank: components
Modern diesel engines employ lots of technology to eke out their impressive mpg figures and minimise emissions, including expensive high-pressure fuel pumps, and common rail injectors with very fine tolerances.
Those fuel pumps are lubricated by diesel fuel itself, as it passes through. Replace that diesel with petrol, and its solvent properties mean the lubrication effect is eliminated too. A fuel pump running without lubrication will soon begin to create internal friction as its metal surfaces grind together. It will then begin to disintegrate, and that in turn creates swarf – potentially microscopic particles of metal that can do even more damage to your car's engine further down the line.
put petrol in diesel car how much should I expect to fix it
The price variable. Depends on the vehicle's make and model and the location.
For instant quote, call our expert advisers and we can send our wrong fuel doctor out to your location straight away if you've put unleaded in a diesel car.
Accidentally putting petrol in a diesel car
Putting petrol in a diesel car is far more serious than filling a petrol car with diesel.
Diesel cars use fuel as a lubricant, but petrol is corrosive so it can cause extensive damage.
Some of the main components that could be adversely affected by putting petrol in a diesel car include the fuel pump, fuel lines, fuel filter and fuel injectors.
The most common signs of a misfuelled diesel are that the engine will make a loud knocking sound whilst accelerating, sluggish acceleration, excessive exhaust smoke, idling will be rough, the engine warning light will illuminate, and your car might stall or struggle to restart.
How petrol harms a diesel engine
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Once the petrol has stripped the lubricant out of the fuel pump, tiny fragments of metal from the parts rubbing together will enter the fuel system. Many of these will be caught by the fuel filter. However, some will make it all the way to the injectors and that’s when the real damage is done.
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Modern diesel injectors work to very fine tolerances, releasing a fine spray of fuel into the cylinders. Even the tiniest foreign body will block the jets, throwing everything out of kilter. It could cause a misfire or the engine might even seize.
What happens when you put petrol in diesel car?
Putting petrol in diesel car may damage your fuel system if not dealt with properly. When you put petrol fuel in, the mix of petrol acts as a solvent, reducing lubrication and causing damage to the pump as the metal parts come into contact and rub together. Other parts of the fuel system which might not be compatible with petrol, can also be damaged. Switching on your car’s ignition will circulate this mix of petrol through your fuel system, causing further contamination to other components - not good! Ultimately, this could mean that the entire fuel system requires costly repairs, or replacing completely.