Should You Worry? Petrol in a Diesel Car in Corbiehall
Unstarted? Then less anxious than you probably are. Petrol sitting in a diesel tank does nothing to the motor till something pulls it through the system — the ignition priming the pump, your starter, or driving on its own. So the honest answer to the first question everyone around Corbiehall asks, "have I wrecked it?", is normally no. To keep it that way, phone Petrol in Diesel then leave your engine alone. 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 does not happen to you a second time.
The motor and petrol in a diesel: what happens
Two jobs fall to diesel on its journey through a motor. It ignites, and before it ignites it protects. Extremely fine tolerances go into the injectors and your high-pressure pump, and only the diesel flowing through stops those surfaces grinding together.
The second job petrol doesn't do at all, and the first it does badly. A pump running on a petrol mix is wearing itself out, since petrol is thinner than diesel and strips out the lubrication the fuel system depends on. Petrol is also made to resist igniting under compression — the opposite of what a diesel wants from its fuel — and that is where the knocking comes.
Taken together, they show what shape the problem takes. The damage is done by circulation, not by contact. All a tank with petrol in it amounts to is a fuel problem. Once your pump has been running on that petrol, a mechanical problem has started: whatever is shed by a pump that is grinding is carried downstream to the fuel injectors with the fuel.
Corbiehall, petrol in a diesel: four cases, from mild to major
Filled but never started — the best it gets. Just the tank has petrol in it, so the job is draining that tank and flushing your system where the car stands. This scenario can only really take place at a forecourt: anywhere else, the vehicle got there by being driven.
Ignition on, or started for a moment. Once primed, the fuel system has drawn petrol out of your tank up to your filter and your lines. That is usually still an easy task — a drain, a flush, and the fuel filter dealt with.
Driven a few miles. Now the pump has spent these miles working on diluted fuel. Tank, lines, filter, then clean fuel run through the entire system: that's this work, and the way the vehicle was driven counts as much as the miles. Driving the children to the local primary school is one kind of trip. Very different a second time: a trip to Dunfermline, under 10 miles away, or some miles on the M9, under 3 miles from Corbiehall, where your engine kept labouring hard.
Driven until it complained. Clattering, a lumpy idle, smoke, a throttle that has gone soft. The motor is telling you the fuel is no longer behaving like diesel. Whether it's the verge on Panbrae Road, a lay-by or a side road, stop there then leave it. A vehicle pulled over quickly very seldom has long-term damage, because the fuel drain and the flush, which still go first, take care of it.
Petrol in a diesel myths Corbiehall people hear
"Top it up the rest of the way with diesel and it will be fine" — a myth. It will not. Nothing is removed by topping up — you're left with a bigger tank, still the same mixture. Percentage is not how a diesel fuel system tolerates petrol, however much that advice supposes.
Myth: a modern diesel copes with a bit of petrol. If anything, the opposite. At higher pressure, through smaller components: that's how a newer diesel handles its fuel, so the protection counts for more, not less.
Myth: "If it starts and drives, there's no harm done." This is the one that catches motorists. Feed diesel to a petrol motor and it usually will not run, so the motorist stops — and the harm stops with them. While the pump grinds, a diesel fed petrol usually starts, idles and drives away as if nothing has happened. Fine and running aren't the same at all.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct fault. None of what petrol thinned is put back by it — and afterwards, the tank still holds that petrol.
The next start sends petrol back round your pump from your lines and the fuel filter, where some of it ends up after the motor has run. That is why draining the tank yourself does not sort it — a myth. On top of that, petrol drained into a can by the road is genuinely hazardous.
How petrol ends up: petrol in a diesel
On purpose? Never. Through carelessness? Seldom, if ever. The petrol nozzle is the slimmer of the two and slips into a diesel filler with almost no resistance; a diesel nozzle mostly won't go into a petrol motor at all. The forecourt makes it easy, and the slip runs one way.
Habit and the car falling out of step is when it occurs. Any motor that is new to you — hired, on loan as a courtesy car, or just bought. A household with one petrol and one diesel on the drive. A forecourt you know, but with its pumps arranged differently. Fuelling up in a rush on the way to Linlithgow, with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that is when. Add a back seat full of kids, a phone call or rain, and habit wins.
How to avoid petrol in a diesel at your next fill-up around Corbiehall
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, though most generally do. Check the pump's label; the colour is just a clue.
- Plenty of vehicles state the fuel type inside your filler flap or on the cap, so check there on the first fill in any car you don't know.
- Good intentions count for less than a sticker or a fob in a vivid colour on the diesel's key when a home has one of each. So mark it.
- It sounds daft and it does the trick: on your first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the pump.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck your phone away then 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 backstop, not a reason to stop checking the petrol pump.
- Noticing it mid-fill? Stop at once. A weaker blend follows from less petrol in that tank, yet your next step stays the same: do not crank it.
Already put petrol in a diesel in Corbiehall?
Short and simple, then, is the order of things. Never fire it up, and do not switch the ignition on. Ask the attendants to help you push it clear of the pump if you are still on the forecourt, whether that is Hastons of Bo'ness or anywhere else. Then ring 0333 366 0103 and tell us what got in, roughly how much, and whether it has run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a different fault — Corbiehall has a page just for it.
Corbiehall petrol in a diesel tasks: why one costs more than another
Four different tasks lie behind the four scenarios above — which is why there's no fair single price. The scenario itself does most of the work of moving your cost. Two things follow that: the petrol that got in as a share of what the tank holds, then the spot the car is in and whether a van can get to it safely.
Three questions come first, before any quote, rather than after — what was put in, how much, has it run — and that is the reason. With those answers, there is a straight figure rather than a range.
About Corbiehall itself
Corbiehall is a coastal suburban area in Falkirk, situated near the Firth of Forth at an elevation of 22 metres. Corbiehall lies within a short distance of several nearby communities, including Deanfield, Castleloan, and Maidenpark. Corbiehall is characterized by its predominantly flat-type housing and is located approximately 7 miles from Dunfermline. Corbiehall is part of the wider Falkirk area, with its residents being around 342 miles from London.
Fuel drain cover across Falkirk, Corbiehall included
The vans answering petrol in diesel calls around Corbiehall, in the EH postcode area, equally work the spots near it, Deanfield, Castleloan and Maidenpark included. No need to bring your car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all spots we drain.
Still at the pump in Corbiehall?
Then you're in the best spot there is. Switched off it stays; then call.