Petrol Into Diesel Car Used the Wrong Fuel at a Garage – Can I Still Run The Car?

Have you ever used the wrong fuel at a garage? If so, you are not alone. More than 100,000 drivers find they have done this every year. As diesel fuelled cars have become more fuel efficient and environmentally friendly, there are more of them on the roads than ever before. The latest generation of diesel engine vehicles are quieter than their predecessors, so drivers often forget to check petrol requirements, especially if it is a hire car. As a result of the difference between petrol and diesel fuel, the damage to the system can be disastrous if it is accidentally used to fill the tank.

Petrol acts as a solvent in diesel engines, reducing lubrication in the diesel pumps, causing damage by the metal on metal contact. If debris gets in the lines, the entire system can become contaminated. Depending on the fuel system, the seals do not work properly and the repair becomes very expensive. If you have used the wrong fuel at a garage, do not turn on the ignition or start the engine. It is best if you call a diesel specialist immediately. If the vehicle is still covered by the manufacturer’s warranty, check with a certified dealer.

Their service department will be able to provide the best advice for correcting the issue. Failing to do so may cause irreparable damage to the engine and invalidate the warranty. There are some manufacturers who may recommend that the seals and filters be replaced by a diesel specialist regardless of whether the engine has been started. Many of the newest diesel pumps are electrical rather than mechanical. They begin to work as soon as the ignition has been engaged.  If you have used the wrong fuel at a garage, you may be able to find a service that can come drain the fuel and flush the system on site.

There are roadside assist options that are available to the general public as well as commercial business customers that employ a diesel specialist that will save time and money. There is a charge, as the fuel does need to be recycled. If you have used the wrong fuel at a garage and more than 10% of the tank has been filled, the vehicle should not be run. Have the tank drained. If less than 10% of the tank has been filled, top with the proper petrol and run normally. These are general guidelines only. When in doubt check with the owner’s handbook or  diesel repair specialist.