Petrol in a Diesel Car in Hindpool: How Worried Should You Be?
Not started? Then less worried than you likely are. Petrol sitting in a diesel tank does nothing to your motor till something draws it through the fuel system — your ignition priming your pump, the starter, or the drive itself. So the honest answer to the first question everyone around Hindpool asks, "have I wrecked it?", is usually no. Keep it that way: leave the engine off and phone Petrol in Diesel. Below, this page sets out what petrol actually does inside a diesel, how far it might have got, and how to stop it happening to you a second time.
Inside your engine: what petrol in a diesel does
Two jobs fall to diesel on its journey through a motor. Lubricating comes before burning; it does both. Built to very fine clearances, the fuel injectors and your pump rely on your diesel moving through them to stop their surfaces wearing against one another.
The second job petrol does not do at all, and the first it does badly. It's runnier than diesel and strips away the lubrication your fuel system rests on, and so a pump running on a petrol mix 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 rattling comes from.
The shape of the trouble is plain once you put those together. Contact doesn't do the harm — movement does. Where the petrol is only inside your tank, it's a problem of fuel, nothing more. A pump that has been running on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds moves on with your fuel to the fuel injectors downstream.
How bad is petrol in a diesel? Four scenarios our engineers see in Hindpool
Fuelled but not once started — as good as it gets. On a forecourt, and really only there, that petrol is still confined to the tank — because anywhere else your car was driven to get to it. The job is draining and purging on the spot.
Ignition on, or started for a moment. Once primed, the fuel system has drawn petrol from the tank as far as the filter and the lines. Still generally simple: drain, flush, and the fuel filter sorted.
Those few miles on the road were your pump working on fuel weakened by petrol the whole way. How hard the car was driven matters as much as how far, and this work takes in the tank, the fuel lines, the filter and fresh fuel through the whole system. Short trips, such as the school run to Brisbane Park Infant School, are one matter. Any mileage on the M6, under 25 miles from Hindpool, means the engine has worked hard throughout, and a run to Lancaster, under 25 miles away, is a very different job as well.
Driven until it complained. Knocking, an uneven idle, smoke, a throttle that has gone soft. The engine is telling you your fuel is no longer acting like diesel. Whether it is the verge on Walney Road, a lay-by or a side street, stop where you are and leave it. Lasting damage is very rare if a vehicle is stopped early, and the fuel drain and flush that still go first take care of it.
Hindpool drivers and that petrol in a diesel stories they hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It won't. Nothing is removed when you top up — the tank simply carries more of the same blend. That guidance presumes a diesel fuel system tolerates petrol by percentage. It doesn't.
Not so: a current diesel copes with a bit of petrol. Rather, the reverse. More precise components and higher pressure are the way a modern diesel runs its fuel, and that makes the protection matter more, not less.
Myth: "If it starts and drives, there is no damage done." This is the one that catches people. Any petrol engine fed diesel generally will not run, and so the motorist stops and the damage stops with them. While the pump wears, a diesel fed petrol usually starts, idles and drives away as though nothing has happened. Fine and running are not the same at all.
Myth: "Add some two-stroke oil and drive it home." It is an outdated workaround for a distinct problem. That petrol is still inside that tank after that, and whatever it has weakened is not put back.
The next start sends petrol back round your pump from your lines and the fuel filter, where some of that sits after your engine has been run. That is why draining your tank yourself does not leave you sorted — a myth. Also, a can of petrol drained by the kerbside is genuinely dangerous.
Why petrol in a diesel occurs so easily
On purpose? Never. Through carelessness? Seldom, if ever. The forecourt makes it simple: the petrol nozzle is the smaller of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle generally will not go into a petrol motor at all. So the slip runs one way.
It takes place when habit and the car stop matching. A new vehicle, a hire car or a courtesy car. Two motors on one drive, one petrol, one diesel. Your usual forecourt, its pumps suddenly in a different order. Rushing for a train at Barrow-In-Furness and fuelling up en route. Precisely the moment it takes place: after years of driving petrol, a driver fills a diesel Volkswagen Passat for the first time. Your hand does what it has always done once you add rain, a phone call or a back seat full of kids.
Hindpool motorists: how to avoid petrol in a diesel next time
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most usually do. Read the petrol pump's label; the colour is just a hint.
- In a vehicle you do not know, look inside the flap over your filler or at the cap before the first fill: many vehicles state the fuel there.
- One of each in the household? Label your key to the diesel — a bright fob, a sticker — since intending to remember isn't enough.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump. It seems silly and it works.
- Mistakes like this are easy to make whilst your mind is on something else, so the phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler designed to block a petrol nozzle, and add-on devices are available for vehicles without one. They are a safety net, not a reason to stop reading the pump.
- Noticing it mid-fill? Stop there and then. A weaker mixture results from less petrol in your tank, but your next step remains the same: don't start the vehicle.
Hindpool: already put petrol in a diesel?
The order of things is short, then. Starting it is out, and so is turning on the ignition. The staff on the forecourt — whether at Asda itself or wherever you filled up — will normally help push it clear of the pump if you ask. Next, 0333 366 0103. We will ask what got in, about how much, and if it has been run.
If it was AdBlue and not petrol, say so. That is a different issue — corrosion and deposits instead of lost lubrication — and it has its own page for Hindpool.
Why one petrol in a diesel task in Hindpool costs more than another
There's no honest single price for this, since the four scenarios above are four separate jobs. Mostly, the cost moves with which situation you are in. Where the car is counts too, and whether a van can safely reach it, after the proportion of petrol to what the tank holds.
What got in, how much, and whether it has run — three queries we ask before pricing, not after, for precisely that reason. A range turns into a straight figure once those answers are in.
About Hindpool, briefly
Hindpool is a coastal suburban area in Cumbria, situated near the town of Barrow-in-Furness and close to the Irish Sea. Hindpool lies at a low elevation of around 17 metres, with its terraced housing stock reflecting the area's historical development. Hindpool is part of the larger urban area surrounding Barrow-in-Furness, with nearby places including North Scale and Vickerstown.
Fuel drain cover across Cumbria, Hindpool included
Petrol in diesel call-outs around Hindpool — part of the LA postcode area — go to teams that also cover the locations about it, Barrow-in-Furness, North Scale and Vickerstown included. The car does not need to come to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
In Hindpool and still at the petrol pump?
In that case, you couldn't be in a better spot. Call, and keep it switched off.