Bexhill-on-Sea: Petrol in a Diesel Car? How Worried to Be
Less than you probably are, provided it has not been started. "Have I ruined it?" is the first thing everyone around Bexhill-on-Sea asks, and the truthful answer is normally no, because petrol resting in a diesel tank harms nothing till it is drawn through your fuel system — by ignition priming, by the starter, or by being driven. To keep it like that, phone Petrol in Diesel then leave the engine alone. The rest of this page covers what petrol really does to a diesel, how to judge how far it has got, and how to make sure it doesn't happen to you again.
Petrol in a diesel: what does it do to the motor?
Diesel has two jobs on its way through an engine. Before it ignites, it lubricates — then it combusts. Extremely fine clearances are built into the fuel injectors and your high-pressure pump, and only the diesel running through stops their surfaces grinding together.
Petrol handles the first job badly and the second not at all. A pump running on a petrol mixture is wearing itself out, because petrol is thinner than diesel and takes away the protection your fuel system relies on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel needs from its fuel — and that's where the rattling starts.
The shape of the problem is plain when you put those together. The damage is done by circulation, not by contact. A tank with petrol in it is a fuel fault. After the pump has been labouring on that petrol, a mechanical issue has begun: whatever is shed by a pump that's wearing down travels onward to the fuel injectors with the fuel.
Bexhill-on-Sea, petrol in a diesel: four situations, from mild to major
Filled up, never started. The best case there can be. Being at a forecourt is what makes this possible: elsewhere, your car has been driven there to begin with. With the petrol held inside the tank alone, it is emptied and flushed on the spot, and nothing more is needed.
Ignition on, or started for a moment. Petrol has left your tank and got to the fuel filter and your lines, because the system has been bled. Usually nothing more than draining, flushing and sorting the filter, and so still straightforward.
Those few miles driven meant the pump labouring on fuel diluted by petrol throughout. Tank, lines, filter, then clean fuel run through the entire system: that is this work, and the way the car was driven matters as much as the mileage. On the school run to St Peter and St Paul CofE Primary School, the miles is short. Getting as far as Brighton and Hove, under 50 miles away, makes a very different task — as does any mileage on the M20, under 50 miles from Bexhill-on-Sea, with your engine working hard all the way.
It protested, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone uneven. The fuel is not acting like diesel any more, and your engine is saying so. Whether it's the verge on Buckhurst Road, a lay-by or a side road, stop there then leave it. Lasting damage is very unusual if a vehicle is stopped early, and the fuel drain and flush that still come first sort it out.
Bexhill-on-Sea drivers and that petrol in a diesel stories they hear
False: topping up to full with diesel makes it fine. It does not. A fuller tank of the same mix is all you get, because topping up removes nothing. That advice supposes a diesel fuel system handles petrol by percentage. It doesn't.
Myth: "A current diesel can cope with a bit of petrol." If anything, the reverse. A current diesel sends its fuel through finer parts at higher pressure, which makes the lubrication matter more, not less.
The myth that catches motorists out: if it starts and drives, it must be unharmed. The driver of a petrol motor fed diesel normally stops, since it will not run, and the damage stops with them. A diesel fed petrol normally starts, ticks over and drives away as though nothing has happened, while the pump wears. Fine and running aren't the same at all.
Not so: a two-stroke additive lets you to drive home. It is an old fix, supposed for another problem. None of what petrol diluted gets put back by it — and later, your tank still contains that petrol.
"Drain it yourself and you are sorted" — a myth, because after it has been running some petrol sits in your filter and lines, ready to go right back through the pump on the next start. Also, a can of petrol filled by the roadside is genuinely hazardous.
How it happens: petrol in a diesel
It is seldom carelessness, and nobody does it on purpose. A diesel nozzle generally will not fit a petrol motor, yet the smaller petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one mistake easy, and just in that direction.
When routine and the car stop matching, it occurs. Hire cars, courtesy cars, and vehicles that are new to you. A household with one petrol and one diesel on the driveway. The pumps in a different order on a well-known forecourt. A train to catch, and a rushed fill en route to Bexhill. A new-to-you diesel Renault Megane, its first fuelling, and a driver accustomed to petrol: precisely when it happens. Add a back seat full of children, a phone call or rain, and the hand takes over.
Bexhill-on-Sea drivers: how to prevent petrol in a diesel next time
- Read the petrol pump, not the colour. In the UK unleaded handles are usually green and diesel black, but not on each forecourt. The label is what matters.
- Many cars state the fuel type inside your filler flap or on the cap, so check there on your first fill in a car you do not know.
- A coloured fob or a sticker on your diesel's key achieves more than any amount of meaning to remember, in a home with one of each.
- "Diesel", out loud, before you lift the nozzle — each time a new or hired car needs its first tank. It sounds silly. It works.
- Put the phone away. This is an easy mistake to make whilst you're thinking about something else.
- Add-on devices are available for vehicles without one, and some diesels come with a filler that won't accept a petrol nozzle. Helpful — but a safety net only, never a reason to stop checking the label.
- Spotting it mid-fill? Stop at once. A thinner blend follows from less petrol inside the tank, but your next stage remains the same: do not start it.
Already put petrol in a diesel around Bexhill-on-Sea?
The order of things is short, then. Starting it is out, and so is switching on the ignition. If you're still on the forecourt — JET or anywhere else — ask the attendants to help you roll the vehicle clear of the pump. Then phone 0333 366 0103 and tell us what was put in, about how much, and whether it has run.
If it was AdBlue and not petrol, say so. That's a separate issue — corrosion and deposits and not lost lubrication — and it has its own page for Bexhill-on-Sea.
One petrol in a diesel job in Bexhill-on-Sea costs more than another. Why?
There's no honest single quote for this, since the four situations above are four different tasks. Mostly, the cost moves with which one you are in. The proportion counts next, meaning how much of that tank is petrol, followed by the location of your car and whether reaching it is safe for our van.
That is why our technicians ask three questions before quoting instead of after: what got in, how much, and if it's run. Those answers turn a range into a straight figure.
About Bexhill-on-Sea, for a moment
Bexhill-on-Sea is a seaside town in East Sussex, situated on the coast of southern England, with a population of around 22414 people. Bexhill-on-Sea has a relatively low elevation of 11 metres above sea level and is located approximately 52.8 miles south-east of London. Bexhill-on-Sea is characterized by its predominant housing type, which is flats, and is close to nearby places such as Old Town and Glenleigh Park. Bexhill-on-Sea is also near the city of Brighton and Hove, which is 26.9 miles to the west.
Fuel drain cover in Bexhill-on-Sea and across East Sussex
Petrol in diesel call-outs in Bexhill-on-Sea — part of the TN postcode area — go to vans that also cover the locations round it, Old Town, Bexhill and Glenleigh Park among them. Our engineers drain where your vehicle is — your own drive, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
Still at the pump in Bexhill-on-Sea?
No position is better: that's where you are. Keep it off. Phone.