Fuel Contamination - Need Help! Call: 01383 513057
How does the wrong fuel type affect engines?
Petrol in a diesel engine Breakdown organisations put the figure of petrol misfuelling at around 150,000 cars a year, with repair bills totalling hundreds of millions of pounds.
Petrol will strip your diesel engine of the lubricant used to keep it ticking over and cause metal components to grate against each other and disintegrate.
This runs the risk of damaging the fuel pump and fuel-injection systems, or wrecking an engine completely if used for a significant amount of time.
To make matters worse pre-ignition systems start fuel pumps in new diesel models when car doors are unlocked. This cuts out the time it takes for new diesel engines to warm up, but means that diesel engines can be ruined by petrol by simply unlocking doors.
The fuel pump and injection systems and filters will likely need to be replaced on new models, while an entire engine could be wrecked beyond repair if it has been run for long enough. Regardless of the extent of the damage, the repair bill could potentially run into thousands of pounds.
Avoiding turning the engine over or stopping as soon as possible is vital to prevent more damage to the engine in these circumstances. A fuel-tank drain could be sufficient in such cases to prevent damage.
Diesel in a petrol engine
Theoretically it should be hard to fill a petrol tank with diesel, as diesel nozzles are too wide to fit into the tank. However using diesel in a petrol engine may destroy the engine´s catalytic converter, necessitating a costly replacement.
How much will this cost?
If you´ve avoided turning on the engine or stopped quickly after turning on the engine a fuel-tank drain may be sufficient. This should cost between £100-£200.
If you´ve driven the car for several miles and your car has a common-rail injection system you may be looking at a bill that runs into quadruple figures.
Am I covered on my breakdown cover?
Misfuelling is not covered by your manufacturer, though they may tow your car to a dealer or garage.
Am I covered on my insurance?
Misfuelling is covered on most insurance policies, those offering comprehensive protection.
What if my car´s on contract hire?
You will have to contact the hire Company
Will my warranty be invalidated?
The answer is no, your manafacturer will threaten to invalidate your warranty if you dont let them carry out the repairs to your vehicle. This is not the case, Patterson Diesel is more qualified to carry out the neccessary work to your vehicle as we are a qualified agent of all major brands of fuel systems, in fact we are a diesel specialist, specialising in diesel fuel injection systems fitting only genuine manafacturer parts to all vehicles under warranty.
Can I dilute the petrol with diesel?
Diluting contaminated fuel may be possible on older cars that lack the fine, high-pressure diesel injection systems of modern diesels. However, this is a high-risk move which could result in the destruction of your engine.
It may be possible to dilute a proportion of petrol to diesel under 10% in such cars, though there´s no guarantee this will work. Your car may run roughly for a while and you may risk long-term damage that is not immediately apparent.
We don´t recommend you try this but if you do risk it you need to be completely sure about your car´s fuel tank and engine system - try this on a common-rail diesel and you´ll simply wreck your engine.
How much biodiesel/ethanol can I safely put in my car?
If you´ve accidentally filled your tank with biodiesel or ethanol the likelihood is you´ll need to drain your tank, unless your car is correctly modified to receive these fuels.
To read up on alternative fuels such as biodiesel and ethanol go to our Jargon section.
What can I do to prevent this?
Aside from buying a Ford model with the Easyfuel system the best thing you can do is to clearly label your vehicle with a sticker above the petrol tank, as car-hire companies generally do. This is particularly important if your car is used by a number of drivers.
Until manufacturers or fuel suppliers address the issue it´s simply a case of having your wits about you and bearing those astronomical repair costs in mind.
Recent moves to introduce such a system by BMW across its model range suggest that manufacturers are intent on tackling the problem.
Here´s a checklist:
• Have you checked if the car you´re driving is a petrol or diesel model? This is particularly important if using a hire car or company car.
• Is everyone who drives your car aware of the fuel-type it uses?
• Have you labelled your fuel tank with a ´Diesel Only´ sticker?
• Do you double-check fuel pumps at petrol stations? Green may not mean unleaded, black may not mean diesel.
• Think you might have filled up with unleaded? Your receipt should tell you.
• Remember NOT to start your engine if you think you´ve filled up with unleaded. If possible do not unlock doors. If you have misfuelled the amount of your repair costs could depend on this.
