Should You Worry? Petrol in a Diesel Car in Templehall
Likely less than you are now — provided nobody has started the car. Petrol sitting in a diesel tank does nothing to the motor until something draws it through your fuel system — the ignition priming your pump, the starter, or driving itself. So the honest answer to the first query anyone in Templehall asks, "have I wrecked it?", is generally no. To leave the vehicle that way, ring Petrol in Diesel then leave the engine switched off. What petrol actually does to a diesel, how to gauge how far it has gone, and how to keep it from happening again: that is the rest of this page.
Inside your engine: what petrol in a diesel really does
Two jobs fall to diesel on its route round a motor. It ignites, and before it combusts it protects. The high-pressure pump and the injectors are designed to extremely fine clearances, and the diesel passing through them is what stops those surfaces from grinding against each other.
Of these two tasks, petrol manages the first badly and the second never. Being less viscous than diesel, petrol strips away the protection a fuel system needs, so a pump on the blend wearing itself. It's equally made to resist igniting under compression — the opposite of what a diesel needs — which is where you hear the rattling.
Together, those leave the shape of the trouble clear. Contact doesn't do the harm — circulation does. All a tank with petrol in it amounts to is a fuel fault. The beginning of a mechanical one is a pump that has been running on that petrol — and whatever a worn pump sheds moves on with the fuel to your injectors beyond it.
How serious is petrol in a diesel? Four situations we see around Templehall
The best case there is: filled up, not once started. That petrol is in the tank and just that tank, and the job is a drain and a flush where your car sits. This is the one situation that can only really occur at a forecourt, since anywhere else your car has been driven to get there.
Ignition on, or started for a moment. Your system has been bled, so petrol has left the tank and reached the filter and the fuel lines. Still usually easy: drain, flush, and the filter dealt with.
Driven a few miles. Now your pump has spent these miles labouring on diluted fuel. Mileage is only half of it; how hard it was driven counts equally. Either way the work includes that tank, your lines, the fuel filter and clean fuel through the entire circuit. Short trips, like the school run to the local primary school, are one matter. Any miles on the M90, under 10 miles from Templehall, means your engine working hard throughout, and a run to Dunfermline, under 15 miles away, makes a very different task too.
Rattling, an uneven idle, smoke, a throttle gone soft: driven till it complained. What you are hearing is your engine signalling fuel that no longer acts like diesel. Whether it's the verge on Cawdor Crescent, a lay-by or a side street, stop there then leave it. The fuel drain and flush still go first, and they take care of it: when a car is stopped early, lasting damage is very unusual.
Myths Templehall drivers 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." Nothing is removed when you top up — the tank just holds more of the same mixture. A diesel fuel system does not accept petrol by percentage in the way that guidance assumes.
If anything, the reverse holds. Myth: "A current diesel can cope with a bit of petrol." Lubrication counts more on modern diesels, not less, since their fuel runs through finer parts at higher pressure.
Myth: "If it starts and drives, there's no damage done." This is the one that fools motorists. A petrol engine fed diesel usually will not run, and so the motorist stops and the harm 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 your pump wears. Running is not the same as fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct problem. None of what petrol thinned gets put back by it — and afterwards, your tank still contains the petrol.
The next start sends petrol back round the pump from the fuel lines and your filter, where some of that sits after the motor has run. That's why a DIY tank drain doesn't sort it — a myth. It's also truly hazardous to drain petrol into a can by the kerbside.
How it happens: petrol in a diesel
No one does it on purpose, and it is seldom carelessness. One way only, since of the nozzles: the smaller petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one generally won't fit a petrol car. That is how the forecourt makes it easy.
When habit and your car stop matching, it happens. Courtesy car, hire car, or a car that's brand new. Two vehicles on one drive, one petrol, one diesel. A familiar forecourt with the pumps in a different order. Racing for a train outside Kirkcaldy 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 coming in, or children to deal with, the hand simply does what it always has.
How to prevent petrol in a diesel at your next fill-up around Templehall
- Green for unleaded and black for diesel is usual in the UK — but not on every forecourt. Trust the label on the pump, not the colour.
- Many motors state the fuel type inside your filler flap or on the cap, so check there on your first fill in a motor you don't know.
- One of each in the house? Label your key to the diesel — a coloured fob, a sticker — because intending to remember isn't enough.
- "Diesel", out loud, before you pick up the nozzle — each time a new or hired car needs its first tank. It sounds daft. It does the trick.
- Thinking about something else is when this becomes an easy mistake to make, so tuck the phone away then keep your mind on the pump.
- Some diesels have a filler built to reject a petrol nozzle, and devices you can add exist 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 there and then. A thinner mix results from less petrol in your tank, yet the next step remains the same: do not fire it up.
Already put petrol in a diesel in Templehall?
Then, there is just a short order of things. Leave it unstarted, with your ignition off as well. If you are still at the forecourt — Shell or anywhere else — ask the attendants to help you push the car clear of the petrol pump. Call 0333 366 0103 next, with three answers — the fuel, the rough quantity, and whether it's run.
Corrosion and deposits form the trouble with AdBlue, where petrol means lost lubrication. So if it was AdBlue, say so — and see its own Templehall page.
Templehall petrol in a diesel tasks: why one costs more than another
An honest single price doesn't exist here: four situations, four separate tasks. What moves your cost is mostly which of them you are in. Next it is the share — how much petrol went in against how much that tank holds — and then where the vehicle is and whether our van can reach it safely.
Before any quote, not after, we ask three questions: the fuel that was put in, its amount, and whether it's run. That's why. A range turns into a straight figure when the replies are in.
About Templehall, briefly
Templehall is a suburban area in Fife, situated on the coastal fringe of Scotland, with a mix of terraced housing and local amenities. Templehall sits at an elevation of around 85 metres, overlooking the Firth of Forth, and is located near other residential areas such as Dunnikier and Hayfield. Templehall is part of the wider commuter belt around Dunfermline, which is approximately 11 miles away. Templehall has a population of around 7002 residents, making it a sizable community in the region.
Fuel drain cover across Fife, Templehall included
Dunnikier, Newliston and Hayfield are among the places near Templehall that the same teams work, answering petrol in diesel calls across Templehall's KY postcode area. You need not move your car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all spots where we work.
Templehall: still at the petrol pump?
Then you are in the best spot there can be. Turned off it stays; then phone.