Altishane: Petrol in a Diesel Car? How Worried to Be
Likely less than you already are — provided no one has started the car. Everyone in Altishane begins with "have I ruined it?", and the fair answer is usually no: petrol resting inside that tank of any diesel stays harmless till priming, cranking or driving draws it into the fuel system. To leave the vehicle that way, phone Petrol in Diesel then leave the motor switched off. What petrol really does to a diesel, how to gauge how far it has gone, and how to keep it from happening a second time: that's the remainder of this page.
The motor and petrol in a diesel: what happens
On its way through an engine, diesel does two jobs. It combusts, and before it burns it lubricates. What stops the surfaces inside the high-pressure pump and the injectors from wearing down against each other is the diesel flowing through them — they're made to extremely fine clearances.
Of those two tasks, petrol manages the first poorly and the second not at all. A pump running on a petrol mixture is wearing itself out, since petrol is runnier than diesel and strips out the lubrication your fuel system depends on. Petrol is also made to resist igniting under compression — the reverse of what a diesel needs from its fuel — and that is where any rattling comes.
Put those together and the shape of the issue is plain. The damage is done by circulation, not by contact. Petrol in the tank is a fuel issue. A pump that has been running on that petrol is the start of a mechanical one, and whatever a worn pump sheds travels on with your fuel to the injectors downstream.
How serious is petrol in a diesel? Four scenarios we see in Altishane
The best case there is: filled up, not once started. Being on a forecourt is what makes this possible: elsewhere, the vehicle has been driven there to begin with. With the petrol kept inside that tank alone, it is drained and purged on the spot, and nothing more is needed.
The ignition turned on, or a short start. Petrol has left that tank and reached the fuel filter and the lines, since your system has been primed. That's generally still a simple job — a drain, a flush, and the filter dealt with.
Driven a couple of miles. Now your pump has spent those miles running on thinned fuel. How hard the car was driven matters as much as how far, and the work takes in the tank, the fuel lines, your filter and fresh fuel through the entire circuit. Short trips, like the school run to the local primary school, are one matter. Any miles on the M77, over 50 miles from Altishane, means the motor working hard throughout, and a run to Derry, under 15 miles away, is a very different job too.
It protested, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone lumpy. The motor is telling you the fuel is no longer behaving like diesel. Leave it wherever it has stopped: a lay-by, a side street, the verge on Crown Street. Long-term damage is very unusual when a vehicle is pulled over soon, and the drain and flush that still come first deal with it.
Altishane people and the petrol in a diesel stories they hear
"Top it up the rest of the way with diesel and it will be fine" — a myth. It will not. Nothing comes out when you top up — the tank just carries more of the same blend. Percentage isn't how a diesel fuel system copes with petrol, however much that advice presumes.
Myth: "A current diesel can cope with a bit of petrol." If anything, the opposite. Finer parts and higher pressure are how a modern diesel runs its fuel, and that makes the protection matter more, not less.
This is the one that fools drivers. Myth: "If it starts and drives, there is no damage done." The motorist of a petrol motor fed diesel usually has no choice but to stop, since it will not run, and the harm stops there. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile the pump grinds. A running engine does not mean fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct issue. What petrol has diluted remains diluted, and that petrol stays inside the tank anyway.
"Drain it yourself and you are sorted" — a myth, since after it has been running some petrol lies in the fuel filter and lines, ready to go right back through your pump at the next start. It's also truly risky to drain petrol into a can at the roadside.
How petrol ends up: petrol in a diesel
It is rarely carelessness, and nobody does it on purpose. 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 will not fit a petrol vehicle. That is how the forecourt makes it straightforward.
When routine and the car stop matching, 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. Your ordinary forecourt, its pumps now in a different order. A train to catch, and a rushed fill on the way to the nearest station. Years of petrol vehicles behind you, a diesel Volkswagen Tiguan in front of you on the forecourt for its first tank — that is when. Throw in rain, a phone call or a back seat full of kids, and your hand does what it has always done.
Avoiding petrol in a diesel next time you fill up around Altishane
- Green for unleaded and black for diesel is normal in the UK — but not on every forecourt. Go by the label on the pump, not the colour.
- Plenty of vehicles state the fuel type inside the filler flap or on the cap, so check it on your first fill in a vehicle you don't know.
- Good intentions do less than a sticker or a fob in a bright colour on the diesel's key when a household has one of each. So label it.
- It sounds daft and it does the trick: on the first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump.
- Thinking about something else is when this becomes an easy mistake to make, so tuck your phone away and keep your mind on the pump.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler built to reject a petrol nozzle, and aftermarket devices are available for the rest. Treat it as a backstop, then keep reading the pump.
- The moment you notice, stop: less petrol inside that tank makes a weaker mixture. What to do next doesn't change, though — still don't crank it.
Altishane: already put petrol in a diesel?
Then, there is just a short order of things. Do not fire it up, and don't turn your ignition on. Ask the staff to help you push it clear of the pump if you are still at the forecourt, whether that is the nearest petrol station or anywhere else. Next, 0333 366 0103. We will ask what was put in, roughly how much, and if it has been run.
Say so if it was AdBlue rather than petrol: it is a different problem, with its own page for Altishane, since AdBlue brings corrosion and deposits instead of lost protection.
One petrol in a diesel task around Altishane costs more than another. Why?
Four separate jobs sit behind the four scenarios above — which is why there is no honest single quote. The situation itself does most of the work of moving your cost. Next it's the proportion — how much petrol was put in against how much your tank holds — and after that where your car is and whether a technician can reach it safely.
Three questions come first, before any quote, instead of after — what was put in, how much, has it run — and that is the reason. Those replies are what change a range into one firm number.
About Altishane, briefly
Altishane is a locality in County Tyrone, situated inland at an elevation of 141 metres, approximately 11 miles from Derry. Altishane is characterised by its predominantly detached housing stock, reflecting the area's residential nature. Altishane sits within a network of nearby places, including Dunnamanagh, Glenmornan, and Artigarvan, in the wider countryside of Northern Ireland.
Fuel drain cover around Altishane and across County Tyrone
The vans answering petrol in diesel jobs in Altishane, in the BT postcode area, also work the spots around it, Dunnamanagh, Glenmornan and Artigarvan among them. No need to move your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations we drain.
At the pump in Altishane, right now?
Then you're in the best position there is. Leave the car switched off, then ring.