How Worried Should You Be? Petrol in a Diesel Car in Westgate Common
Provided it has not been started, worry far less than you likely are. Until your ignition primes your pump, the starter cranks, or the car is driven, petrol in a diesel tank simply waits there and does nothing. Which makes the honest reply to that first Westgate Common question — "have I ruined it?" — normally no. Leave your motor off and phone Petrol in Diesel — that is how you keep it like that. The rest of this page explains 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 a second time.
Petrol in a diesel: what does it do to the engine?
Passing through an engine, diesel is doing two jobs at once. Before it ignites, it lubricates — then it ignites. Built to extremely fine gaps, the injectors and your pump rely on your diesel moving through them to stop their surfaces wearing against one another.
Of these two tasks, petrol handles the first poorly and the second never. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, leaving a pump on the mixture to wear itself. It is equally made to resist igniting under compression — the reverse of what a diesel needs — which is where you get the clattering.
Seen together, they show what shape the problem takes. It is movement that causes the harm, not contact. Any tank with petrol in it is a fuel fault. Once the pump has been working on that petrol, a mechanical fault has begun: anything shed by a pump that is wearing travels downstream to the fuel injectors with the fuel.
Four situations our technicians see in Westgate Common: how bad is petrol in a diesel?
The best case there can be: filled up, not once started. Only the tank has petrol in it, so the job is emptying the tank and purging your system where your car stands. This situation can only really occur at a forecourt: anywhere else, your car got there by being driven.
Started for a moment, or just the ignition on. Petrol has left your tank and reached the fuel filter and the lines, since the system has been bled. Usually little more than clearing, rinsing and seeing to the filter, so still simple.
Driven a few miles. Now the pump has spent those miles running on thinned fuel. Tank, lines, filter, then clean fuel run through the entire system: that's the work, and the way the car was driven matters as much as the mileage. The school run to Wakefield Lawefield Primary School is one matter. Driving as far as Wakefield, under a mile away, makes a very different job — as does any mileage on the M1, under 3 miles from Westgate Common, with the motor working hard the whole time.
Driven until it protested. Knocking, an uneven idle, smoke, a throttle that has gone soft. That is your engine telling you its fuel no longer is acting like diesel. Pull up wherever you are — the verge on The Rowick, a lay-by, a side street — then leave it there. What goes first is still the drain and flush, and that deals with it, with long-term damage very unusual when a vehicle is pulled over soon.
Myths Westgate Common motorists hear about petrol in a diesel
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing is removed by topping up — you're left with a fuller tank, still the same mixture. That guidance assumes a diesel fuel system handles petrol by percentage. It doesn't.
"Current diesels can handle a little petrol" — a myth, and nearer the opposite. A newer diesel sends its fuel through more precise components at higher pressure, which makes the protection count more, not less.
This is the one that fools people. Myth: "If it starts and drives, there is no damage done." Any petrol engine fed diesel usually won't run, and so the motorist stops and the harm stops with them. Feed petrol to a diesel and it usually fires up, ticks over and pulls away like nothing has happened — all the while its pump wears. Fine and running aren't the same thing.
Not so: a two-stroke additive makes it safe to drive home. It was an old workaround, meant for another problem. None of what petrol thinned is put back by it — and afterwards, your tank still contains that petrol.
"Drain it yourself and you're sorted" — a myth, since after it has been running some petrol lies in the filter and lines, ready to go straight back through the pump at the next start. Besides, petrol cleared into a can by the road is truly hazardous.
Why petrol in a diesel occurs at all
Carelessness is seldom the cause, and no one means to do it. One way only, because of the nozzles: the narrower petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one generally will not fit a petrol car. That is how the forecourt makes it easy.
The moment routine stops matching your car is the moment it happens. Hire cars, courtesy cars, and motors that are new to you. One petrol and one diesel on the drive of the same household. The pumps in a different order on a familiar forecourt. A train to catch, and a rushed fill on the way to Wakefield Westgate. Exactly the moment it takes place: after years of driving petrol, someone fills a diesel Volkswagen Tiguan for the first time. Throw in a back seat full of children, a phone call or rain, and the hand takes over.
Next time you fill up around Westgate Common: preventing petrol in a diesel
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, though most generally do. Read the petrol pump's label; the colour is just a clue.
- Inspect your filler flap. Many motors state the fuel inside the flap or on the cap. Look at it on the first fill in any motor you don't know.
- Mark your key. In a home with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of intending to remember.
- "Diesel", aloud, before you lift the nozzle — each time a new or hired car needs its first tank. It seems daft. It does the trick.
- Put your phone away. This is an easy mistake to make while you're thinking about something else.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler designed to block a petrol nozzle, and add-on devices exist for motors without one. They are a backstop, not a reason to stop reading the pump.
- As soon as you realise, stop: less petrol inside your tank means a thinner mixture. What to do next does not change, though — still do not start the car.
Petrol already in a diesel in Westgate Common? Begin here
The order of things is short, then. Don't switch the ignition on, and don't fire it up. Yet at the forecourt, at Morrisons or anywhere else? Ask the staff to help you roll it clear of the pump. Then phone 0333 366 0103 and tell us what was put in, roughly how much, and whether it has run.
Say so if it was AdBlue instead of petrol: it's a different problem, with its own page for Westgate Common, because AdBlue brings corrosion and deposits instead of lost protection.
Westgate Common petrol in a diesel jobs: why one costs more than another
An honest single quote does not exist here: four scenarios, four separate tasks. Mostly, the cost shifts with which one you are in. Two things follow that: the petrol that got in as a share of what the tank holds, then the place the car is in and whether a van can get to it safely.
That's why our engineers ask three questions before costing instead of after: what went in, how much, and whether it has run. Given those replies, there is a straight figure rather than a range.
About Westgate Common itself
Westgate Common is a suburban area located on the riverside in West Yorkshire, with a mix of semi-detached housing and local amenities. Westgate Common sits near the city of Wakefield, at an elevation of around 32 metres, and is close to nearby places such as Brooks Bank and Clayton Hill. Westgate Common is situated in a region of Yorkshire that has undergone significant urban development, with the area being part of the larger Wakefield urban area. Westgate Common has a population of approximately 7490 residents, living in a variety of semi-detached homes.
Across West Yorkshire and in Westgate Common: fuel drain cover
The vans answering petrol in diesel jobs in Westgate Common, in the WF postcode area, equally work the locations near it, Brooks Bank, Clayton Hill and New Scarborough included. The car doesn't need to move to us: our technicians drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
Still at the pump in Westgate Common?
Then you are in the best position there is. Phone, and keep it turned off.