How Worried Should You Be? Petrol in a Diesel Car in Kibworth Harcourt
Less than you probably are, provided it has not been started. Petrol sitting in a diesel tank does nothing to your engine till something draws it through the system — your ignition priming the pump, your starter, or driving itself. So the honest answer to the first query anyone around Kibworth Harcourt asks, "have I wrecked it?", is normally no. To keep the vehicle like that, call Petrol in Diesel and leave the motor alone. Further down, this page sets out what petrol really does inside a diesel, how far it may have gone, and how to stop it happening to you again.
Petrol in a diesel: what does it do to the engine?
Diesel does two tasks on its way through an engine. Oiling comes before burning; it does both. Made to extremely fine gaps, the injectors and the pump depend on your diesel moving through them to keep their surfaces from wearing against one another.
Badly at the first, not at all at the second: that's petrol. The clattering comes from petrol being made not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips out the protection your system depends on, and any pump working on that blend is wearing itself.
Taken together, they make clear the shape the issue takes. Not contact but movement is what does the damage. Petrol in the tank is a fuel issue. After your pump has been running on that petrol, a mechanical issue has started: anything shed by a pump that is grinding is carried onward to your injectors with your fuel.
How serious is petrol in a diesel? Four situations we see around Kibworth Harcourt
Filled but not once started — as good as it gets. That petrol is in that tank and only your tank, and the job is a drain and a flush where the vehicle stands. This is the one situation that can only really occur at a forecourt, as anywhere else the vehicle has been driven to get there.
The ignition turned on, or a short start. Petrol has come out of the tank and reached the fuel filter and the fuel lines, since the system has been primed. Usually nothing more than emptying, cleaning and sorting your filter, and so still easy.
Those few miles on the road were your pump working on fuel diluted by petrol the whole way. The work is your tank, the fuel lines, your filter and fresh fuel through the entire circuit, and how hard your car was driven counts as much as how far. The school run to Kibworth Church of England Primary School is one matter. Driving as far as Leicester, under 10 miles away, makes a very different task — as does any miles on the M1, under 10 miles from Kibworth Harcourt, with your engine working hard the whole time.
It protested, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone ragged. That is your engine telling you its fuel has stopped behaving like diesel. Pull up on the spot — on the verge on Leicester Road, at the kerb, down a side road — and do not move it again. A car pulled over soon very rarely has long-term damage, as the fuel drain and the flush-through, which still go first, sort it out.
What Kibworth Harcourt drivers get told about petrol in a diesel — and the stories in it
False: topping up to full with diesel makes it fine. It doesn't. Nothing is removed by topping up — you're left with a fuller tank, still the same mixture. A diesel fuel system doesn't accept petrol by percentage in the way that guidance assumes.
"Modern diesels can handle a little petrol" — a myth, and closer to the opposite. Protection matters more on current diesels, not less, since their fuel passes through finer components at higher pressure.
The myth that catches people out: if it starts and drives, it must be unharmed. Diesel in a petrol motor normally means a motor that won't run: the driver stops, and so does the harm. A diesel fed petrol usually starts, ticks over and drives away as if nothing has happened, while the pump grinds. Running isn't the same as fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a different fault. None of what petrol weakened gets put back by it — and afterwards, that tank still contains that petrol.
"Drain it yourself and you are sorted" — a myth, because after it's been running some petrol lies in the filter and lines, ready to go right back through your pump on your next start. It is also really hazardous to drain petrol into a can by the roadside.
Why petrol in a diesel happens at all
A careless moment is rarely the cause, and nobody means to do it. The forecourt makes it simple: the petrol nozzle is the smaller of the two, and it slips into a diesel filler with almost no resistance, whilst a diesel nozzle mostly will not go into a petrol motor at all. So the slip runs one way.
Routine and the car getting out of step is when it occurs. A new motor, a hire car or a courtesy car. One petrol and one diesel on the driveway of the same household. A forecourt you know, only with its pumps arranged differently. A train to catch, and a hurried fill on the way to Market Harborough. A new-to-you diesel BMW 3 Series, its first fuelling, and a driver accustomed to petrol: exactly when it takes place. Your hand does what it has always done when you add rain, a phone call or a back seat full of kids.
Next time you fill up in Kibworth Harcourt: avoiding petrol in a diesel
- The label is what matters, and so read the pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on each forecourt.
- Plenty of vehicles state the fuel type inside the filler flap or on the cap, so check it on your first fill in a car you do not know.
- One of each in the house? Mark your key to the diesel — a bright fob, a sticker — since intending to remember is not enough.
- Before the nozzle leaves the pump the first time you fuel a hired or new vehicle, say "diesel" aloud. Silly, yes, yet it works.
- While you're thinking about something else, this is an easy mistake to make — so tuck your phone away.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to block a petrol nozzle, and add-on devices are available for motors without one. They are a backstop, not a reason to stop checking the pump.
- Spotting it mid-fill? Stop at once. A thinner blend follows from less petrol in that tank, but the next stage remains the same: do not fire it up.
Kibworth Harcourt: already put petrol in a diesel?
Then the order of things is short. Do not switch the ignition on, and do not start it. Ask the staff to help you push it away from the pump if you are still on the forecourt, whether that is Mobil or anywhere else. Phone 0333 366 0103 next, with three answers — the fuel, the rough volume, and whether it's run.
Corrosion and deposits are the problem with AdBlue, where petrol brings lost lubrication. So if it was AdBlue, say so — and read its own Kibworth Harcourt page.
One petrol in a diesel task in Kibworth Harcourt costs more than another. Why?
The four situations above are four different jobs, so no single quote for this would be honest. The situation itself does most of the work of moving the cost. After that it is the share — how much petrol went in against how much the tank takes — and then where the vehicle is and whether our van can get to it safely.
Ahead of any quote, not after, come three queries: your fuel that was put in, its volume, and whether it's run. That is why. With the answers, there is a straight figure rather than a range.
About Kibworth Harcourt, briefly
Kibworth Harcourt is a village in Leicestershire, situated approximately 8.6 miles southeast of Leicester, and is part of a wider area that includes the nearby villages of Kibworth Beauchamp and Smeeton Westerby. Kibworth Harcourt sits at an elevation of around 121 metres, in a rural landscape of rolling hills and fields. Kibworth Harcourt has a population of around 1637 people, living in a mix of housing types, with semi-detached homes being particularly prevalent.
Kibworth Harcourt and Leicestershire: where our fuel drain cover reaches
The vans answering petrol in diesel call-outs in Kibworth Harcourt, in the LE postcode area, equally work the spots near it, Kibworth Beauchamp, Smeeton Westerby and Tur Langton included. No need to bring the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all locations we drain.
Still at the petrol pump in Kibworth Harcourt?
No position is better: that's where you are. Phone, and keep it switched off.