How Worried Should You Be? Petrol in a Diesel Car in Huntington
If it has not been started, you can worry far less than you likely are. Till your ignition primes your pump, the starter cranks, or the vehicle is driven, petrol in a diesel tank just rests there and does nothing. Which makes the truthful reply to the first Huntington question — "have I wrecked it?" — usually no. Petrol in Diesel is who to call, with your engine left off, so it remains that way. Further down, this page sets out what petrol actually does inside a diesel, how far it may have got, and how to stop it happening to you again.
Petrol in a diesel: what does it do to your engine?
Two jobs fall to diesel on its route round a motor. Before it combusts, it lubricates — and then it ignites. The high-pressure pump and the fuel injectors are built to very fine clearances, and your diesel passing through them is what stops those surfaces from wearing down against each other.
The second job petrol doesn't do at all, and the first it does badly. It's thinner than diesel and takes away the protection your fuel system depends on, so a pump running on a petrol mix is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That is where the rattling comes from.
Combined, those make the shape of the trouble plain. Contact does not do the damage — circulation does. All a tank with petrol in it amounts to is a fuel issue. A pump that has been working on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with your fuel to the fuel injectors downstream.
Huntington, petrol in a diesel: four cases, from mild to significant
Filled but never started — as good as it gets. Only your tank has petrol in it, so the job is clearing your tank and purging the fuel system where the car sits. This situation can only truly occur on a forecourt: anywhere else, your car got there by being driven.
Started for a second, or only your ignition on. Petrol has come out of that tank and reached your filter and your lines, since the system has been primed. Still generally easy: drain, flush, and the filter dealt with.
A couple of miles driven, and your pump has spent each of them labouring on weakened fuel. How hard the vehicle was driven counts as much as how far, and this work covers that tank, the lines, the filter and fresh fuel through the entire system. On the school run to Huntington Primary Academy, the distance is short. Very different once more: a run to York, under 3 miles away, or any miles on the A1(M), under 15 miles from Huntington, where the motor kept labouring hard.
Driven till it protested. Clattering, an uneven idle, smoke, a throttle that has gone soft. What you are hearing is your motor reporting fuel that no longer behaves like diesel. Stop wherever you are — the verge on Huntington Road, a lay-by, a side street — and leave it where it is. A car pulled over quickly very seldom has permanent damage, because the drain and the flush-through, which still come first, take care of it.
Stories Huntington motorists hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." A fuller tank of the same mix is all it gives, since topping up removes nothing. A diesel fuel system does not tolerate petrol by percentage in the way that advice supposes.
Myth: a current diesel copes with a bit of petrol. Rather, the reverse. Lubrication counts more on newer diesels, not less, because their fuel passes through smaller parts at higher pressure.
This is the one that catches people. Myth: "If it starts and drives, there's no damage done." Any petrol motor fed diesel generally won't run, and so the motorist stops and the damage stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile the pump wears. Being able to run isn't the same as being fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a separate fault. None of what petrol diluted is put back by it — and afterwards, your tank still holds that petrol.
Once the engine has been run, part of the petrol is in your filter and the fuel lines, not your tank — and the next start pulls it right back through the pump. So the myth "drain your tank yourself and you're sorted" does not stand up. Draining petrol into a can by the roadside is also genuinely hazardous.
Petrol in a diesel: how does it occur?
No one does it on purpose, and it's seldom carelessness. One way only, because of the nozzles: the narrower petrol one slips inside a diesel filler with almost no resistance, while the diesel one mostly won't fit a petrol vehicle. That is how the forecourt makes it easy.
It happens when routine and the car stop matching. A new car, a hire car or a courtesy car. Households running one of each, petrol and diesel. The pumps in a different order on a familiar forecourt. Rushing for a train outside York and fuelling up en route. A new-to-you diesel Volkswagen Golf, its first fuelling, and a motorist accustomed to petrol: precisely when it takes place. With rain, a call arriving, or a car full of children to deal with, your hand just does what it has always done.
Next time you fill up in Huntington: preventing petrol in a diesel
- The label is what counts, so read the petrol pump rather than the colour: in the UK unleaded handles are normally green and diesel black, but not on every forecourt.
- The first fill in a new vehicle is the time to check your filler flap — inside it, or on the cap, many cars state which fuel to use.
- One of each in the home? Mark the key to your diesel — a coloured fob, a sticker — since intending to remember isn't enough.
- It sounds daft and it does the trick: on the first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump.
- Thinking about something else is when this becomes an easy mistake to make, and so put your phone away and keep your mind on the petrol pump.
- Some diesels have a filler built to block a petrol nozzle, and devices you can add are available for motors without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop reading the pump.
- Spotting it halfway? Stop at once. A weaker mix results from less petrol in your tank, but the next step remains the same: do not start the car.
Already put petrol in a diesel around Huntington?
Short and simple, then, is the order of things. Do not fire it up, and do not switch the ignition on. If you're still at the forecourt — Sainsbury's or anywhere else — ask the attendants to help you push it away from the pump. Phone 0333 366 0103 next, with three answers — your fuel, the rough volume, and whether it's run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost protection, make it a different issue — Huntington has a page all for it.
What makes one Huntington petrol in a diesel task cost more than the next
Four separate jobs sit behind the four scenarios above — which is why there is no fair single quote. The scenario itself does most of the work of moving the cost. After that it is the ratio — how much petrol was put in against how much your tank takes — and then where the vehicle is and whether a technician can get to it safely.
Three queries come first, before quoting, rather than after — what got in, how much, has it run — and this is the reason. The replies change a range into a straight figure.
About Huntington itself
Huntington is a locality situated on the River Foss in North Yorkshire, approximately 2.5 miles from the city of York. Huntington sits at a low elevation of around 18 metres, with semi-detached housing being the predominant type of accommodation in the area. Huntington is close to several nearby places, including New Earswick, Earswick, and Haxby, and is part of the larger York urban area.
Fuel drain cover across North Yorkshire, Huntington included
Huntington sits in the YO postcode area, and our teams that answer petrol in diesel call-outs there work the spots around it as well — New Earswick, Earswick and Haxby among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all places we drain, and the car does not need to move to us.
Huntington: still at the pump?
Then you're in the best place there is. Keep the car turned off, and ring.