Petrol in a Diesel Car in Lower Bunbury: How Worried Should You Be?
Not started? Then less worried than you likely are. Everyone in Lower Bunbury starts with "have I ruined it?", and the fair answer is generally no: petrol left inside that tank of any diesel remains harmless until priming, cranking or driving draws it into the fuel system. To keep the car that way, phone Petrol in Diesel then leave your motor alone. What petrol actually does to a diesel, how to gauge how far it's gone, and how to stop it from happening a second time: that's the rest of this page.
Your engine and petrol in a diesel: what goes on
Passing through an engine, diesel does two things at once. It burns, and before it burns it protects. What keeps the surfaces inside the high-pressure fuel pump and the injectors from wearing down against each other is your diesel passing through them — they're designed to very fine clearances.
The second task petrol does not do at all, and the first it does poorly. It is runnier than diesel and removes the protection the system rests on, so a pump running on a petrol mixture is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the opposite of what a diesel needs from its fuel. That's where the clattering comes from.
Combined, those make the shape of the trouble plain. The harm is done by circulation, not by contact. All a tank with petrol in it amounts to is a fuel problem. Once the pump has been working on that petrol, a mechanical problem has started: anything shed by a pump that is wearing is carried downstream to the fuel injectors with the fuel.
How serious is petrol in a diesel? Four scenarios our technicians see in Lower Bunbury
Fuelled up, never started. The best case there is. Being on a forecourt is what makes this possible: elsewhere, your car has been driven there to begin with. With the petrol held in the tank alone, it's emptied and rinsed right where it stands, and nothing more is needed.
The ignition turned on, or a brief start. Petrol has come out of the tank and reached your filter and the fuel lines, since the fuel system has been bled. That is generally still a simple job — a drain, a flush, and the fuel filter seen to.
Those few miles driven meant your pump working on fuel thinned by petrol the whole way. Mileage is only half of it; how hard it was driven counts just as much. Either way the work includes your tank, the lines, your filter and clean fuel through the whole circuit. Driving the kids to Bunbury Aldersey CofE Primary School is one sort of trip. Very different a second time: a run to Chester, under 15 miles away, or some mileage on the M53, under 15 miles from Lower Bunbury, where the engine never stopped running hard.
Driven till it complained. Clattering, an uneven idle, smoke, a throttle that has gone soft. What you are hearing is the engine signalling fuel that no longer acts like diesel. Stop wherever you are — the verge on Hill Close, a lay-by, a side street — and leave the vehicle there. Long-term damage is very rare when a car is stopped soon, and the fuel drain and flush-through that still come first sort it out.
What Lower Bunbury drivers get told about petrol in a diesel — and the stories in it
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing comes out when you top up — your tank simply holds more of the same mixture. That advice presumes a diesel fuel system handles petrol by percentage. It doesn't.
If anything, the reverse holds. Myth: "A current diesel can cope with a bit of petrol." A current diesel runs its fuel through more precise components at higher pressure, which makes the lubrication matter more, not less.
One myth that catches motorists out: if it starts and drives, it must be unharmed. A petrol engine fed diesel usually won't run, and so the driver stops and the damage stops with them. Feed petrol to a diesel and it normally starts, ticks over and pulls away like nothing has happened — all while its pump wears. Running isn't the same as fine.
Not so: a two-stroke additive makes it safe to drive home. It was an old fix, supposed for another problem. It does not put back what petrol has thinned, and the petrol is still in that tank after that.
"Drain it yourself and you are sorted" — a myth, since after it has been running some petrol sits in your filter and lines, ready to go straight back through your pump at the next start. Besides, petrol cleared into a can by the road is genuinely risky.
Why petrol in a diesel takes place so easily
On purpose? Never. Through carelessness? Seldom, if ever. The petrol nozzle is the slimmer of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol vehicle at all. The forecourt makes it simple, and the slip runs one way.
It takes place when routine and the car stop matching. Hire cars, courtesy cars, and cars that are new to you. A household with one petrol and one diesel on the driveway. A forecourt you know, only with its pumps arranged differently. Rushing for a train outside Nantwich and filling up en route. The first fill-up in a diesel Renault Megane after years of driving petrol is precisely the moment it takes place. Your hand does what it has always done once you add rain, a phone call or a back seat full of children.
Next time you fill up around Lower Bunbury: preventing petrol in a diesel
- The label is what matters, so check the pump rather than the colour: in the UK unleaded handles are usually green and diesel black, yet not on every forecourt.
- Plenty of motors state the fuel type inside your filler flap or on the cap, so check it on your first fill in any car you do not know.
- Mark your key. In a home with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember.
- It sounds daft and it does the trick: on the first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the pump.
- Tuck your phone away. This is an easy mistake to make whilst you are thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler built to reject a petrol nozzle, and aftermarket devices are available for the remainder. Treat it as a backstop, then keep checking the pump.
- As soon as you notice, stop: less petrol in the tank means a thinner blend. What to do next doesn't change, though — still do not fire it up.
Already put petrol in a diesel in Lower Bunbury?
Short and simple, then, is the order of things. Don't start it, and don't turn the ignition on. Yet at the forecourt, at Texaco or anywhere else? Ask the staff to help you push it away from the pump. Next, 0333 366 0103. We will ask what was put in, roughly how much, and if it's been run.
If it was AdBlue rather than petrol, say so. That's a separate problem — corrosion and deposits and not lost lubrication — and it has its own page for Lower Bunbury.
One petrol in a diesel task in Lower Bunbury costs more than another. Why?
Four different tasks sit behind the four situations above — which is why there's no fair single quote. Which of them you are in is chiefly what shifts the cost. Where the vehicle is counts too, and whether a technician can safely get to it, after the ratio of petrol to what the tank holds.
That is why our technicians ask three queries before quoting instead of after: what went in, how much, and if it's run. Given the replies, there is a straight figure instead of a range.
About Lower Bunbury itself
Lower Bunbury is a suburban area in Cheshire, situated inland at an elevation of 73 metres, and is located near the villages of Bunbury and Spurstow. Lower Bunbury is characterized by its predominantly detached housing stock, reflecting its development as a residential area. Lower Bunbury sits within the wider economic and cultural sphere of Chester, which is approximately 11 miles away. Lower Bunbury is also part of the larger North West region of England, about 154 miles from London.
Lower Bunbury and Cheshire: where our fuel drain cover reaches
The vans answering petrol in diesel jobs in Lower Bunbury, in the CW postcode area, also work the locations near it, Bunbury, Bunbury Heath and Spurstow among them. You need not bring your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all locations we drain.
At the petrol pump around Lower Bunbury, still?
No position is better: that's where you now are. Keep the car switched off, and ring.