Should You Worry? Petrol in a Diesel Car in West End
Not started? Then less anxious than you likely are. Until your ignition primes your pump, the starter turns, or your car is driven, petrol in a diesel tank simply rests there and does no harm. Which makes the honest reply to that first West End query — "have I wrecked it?" — normally no. Keep it that way: leave your motor off and phone Petrol in Diesel. What petrol really does to a diesel, how to judge how far it has gone, and how to keep it from happening a second time: that is the remainder of this page.
Inside your engine: what petrol in a diesel really does
Diesel does two jobs on its way through an engine. It burns, and before it combusts it lubricates. Your high-pressure pump and the injectors are designed to extremely fine gaps, and the diesel passing through them is what stops those surfaces from grinding against one another.
Of these two tasks, petrol manages the first badly and the second never. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, leaving a pump running on that mixture to wear itself. It is equally made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the clattering.
The shape of the issue is plain once you put those together. The harm is done by circulation, not by contact. Petrol in a tank is a fuel issue. A pump that has been working on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to your injectors further on.
How serious is petrol in a diesel? Four situations our technicians see in West End
Filled up, never started. The best case there is. The petrol is inside that tank and just the tank, and the job is a drain and a flush where the vehicle sits. This is the one scenario that can only really occur at a forecourt, as anywhere else your car has been driven to get there.
A moment's running, or merely the ignition on. Once primed, the fuel system has pulled petrol out of your tank up to the fuel filter and the lines. Still generally simple: drain, flush, and the filter seen to.
The pump has worked a couple of miles on weakened fuel — that's what driving it meant. How hard the vehicle was driven counts as much as how far, and this work covers that tank, the lines, your filter and clean fuel through the whole system. Driving the children to King Ina Church of England Academy is one kind of trip. Very different a second time: a run to Wells, under 15 miles away, or some mileage on the M5, under 15 miles from West End, where the motor kept working hard.
Clattering, an uneven idle, smoke, a throttle gone soft: driven till it complained. The engine is telling you the fuel is no longer acting like diesel. Leave it wherever it stops: a lay-by, a quiet street, the verge on St Cleer's Orchard. A car pulled over soon very seldom has lasting damage, because the drain and the flush, which still go first, deal with it.
Stories West End drivers hear about petrol in a diesel
Myth: topping up to full with diesel makes it fine. It doesn't. A fuller tank of the same mix is all you get, since topping up takes out nothing. A diesel fuel system doesn't tolerate petrol by percentage in the way that advice presumes.
Myth: a modern diesel copes with a bit of petrol. Rather, the opposite. Lubrication matters more on newer diesels, not less, since their fuel runs through smaller parts at higher pressure.
This is the one that catches drivers. Myth: "If it starts and drives, there is no harm done." Diesel in a petrol motor usually leaves a motor that will not run: the driver stops, and so does the damage. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile your pump wears. Fine and running aren't the same at all.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a distinct fault. What petrol has weakened stays diluted, and that petrol remains inside that tank anyway.
"Drain it yourself and you are sorted" — a myth, since after it has been running some petrol lies in the filter and lines, ready to go straight back through your pump on the next start. And, a can of petrol drained at the kerbside is truly hazardous.
Why petrol in a diesel takes place so easily
It is rarely carelessness, and no one does it on purpose. One way only, because of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, while the diesel one generally will not fit a petrol vehicle. That's how the forecourt makes it easy.
It takes place when habit and your car stop matching. Courtesy car, hire car, or a car that is new. A household with one petrol and one diesel on the driveway. A forecourt you know, but with its pumps laid out differently. Racing for a train at Yeovil Pen Mill and filling up en route. Years of petrol vehicles behind you, a diesel Renault Megane in front of you on the forecourt for its first tank — that is when. Add rain, a phone call or a back seat full of children, and the hand repeats what it has always done.
Avoiding petrol in a diesel next time you fill up in West End
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most generally do. Check the petrol pump's label; the colour is just a hint.
- Many motors state the fuel inside your filler flap or on the cap, and so check there on the first fill in a motor you do not know.
- One of each in the household? Mark the key to the diesel — a bright fob, a sticker — because intending to remember is not enough.
- It sounds silly and it does the trick: on the first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump.
- Mistakes like this are straightforward to make whilst your mind is on something else, so your phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to reject a petrol nozzle, and add-on devices exist for motors without one. They are a safety net, not a reason to stop reading the pump.
- As soon as you notice, stop: less petrol inside the tank means a thinner mix. What to do next does not change, though — still don't start it.
Put petrol in a diesel around West End already?
Then, there is only a short order of things. Don't switch the ignition on, and do not crank it. If you are still on the forecourt — Esso or anywhere else — ask the attendants to help you roll the vehicle clear of the pump. What went in, about how much, and if it's run: tell us those when you ring 0333 366 0103.
Say so if it was AdBlue instead of petrol: it is a different problem, with its own page for West End, because AdBlue brings corrosion and deposits instead of lost protection.
Why one petrol in a diesel task around West End costs more than another
A fair single price does not exist here: four situations, four separate tasks. Mostly, your cost moves with which situation you are in. Where the car is counts too, and whether a technician can safely get to it, after the proportion of petrol to what that tank takes.
What went in, how much, and whether it's run — three questions our technicians ask before quoting, not after, for precisely that reason. A range turns into a straight figure when the answers are in.
About West End
West End is a suburban area in Somerset, situated inland at an elevation of 38 metres, with semi-detached housing being the predominant type of accommodation. West End lies approximately 11.6 miles from the city of Wells and is surrounded by nearby places such as May Pole Knap, St Cleers, and Behind Berry. West End is part of the larger South West region, with London being around 117.2 miles away. West End has a population of around 3745 residents.
Fuel drain cover around West End and across Somerset
West End rests in the TA postcode area, and our teams that answer petrol in diesel calls there work the locations near it as well — May Pole Knap, St Cleers and Behind Berry among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all locations our engineers drain, and the vehicle doesn't need to move to us.
West End: still at the pump?
The best spot there is, then — that is where you are. Keep it off. Phone.