Denton Holme: Petrol in a Diesel Car? How Worried to Be
Provided it hasn't been started, you can worry far less than you probably are. Everyone around Denton Holme begins with "have I wrecked it?", and the fair answer is generally no: petrol left in your tank of any diesel remains harmless until priming, cranking or driving draws it into the fuel system. To keep the car that way, phone Petrol in Diesel and leave your engine alone. What petrol actually does to a diesel, how to judge how far it has travelled, and how to stop it from happening again: that's the remainder of this page.
The engine and petrol in a diesel: what happens
Diesel has two tasks on its way through a motor. It protects to begin with, and after that does it burn. What keeps the surfaces inside your high-pressure pump and the fuel injectors from grinding against one another is the diesel flowing through them — they're built to extremely fine gaps.
Of those two tasks, petrol handles the first poorly and the second not at all. The rattling comes from petrol being designed not to ignite when compressed, which is precisely the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips out the lubrication the fuel system hinges on, and any pump running on such a blend is wearing itself.
Taken together, they show what shape the trouble takes. It's movement that does the damage, not contact. All a tank with petrol in it amounts to is a fuel problem. Whatever a worn pump sheds goes on, carried by your fuel, into your injectors downstream, which is why a pump that has worked on the petrol is where a mechanical fault starts.
Four situations our technicians see around Denton Holme: how serious is petrol in a diesel?
Fuelled up, never started. The best case there is. Just the tank has petrol in it, and so the task is draining that tank and purging the fuel system where your car sits. This situation can only really occur at a forecourt: anywhere else, the vehicle got there by being driven.
A moment's running, or just your ignition on. Once primed, the system has pulled petrol from your tank as far as your filter and the lines. Usually nothing more than clearing, purging and seeing to the fuel filter, and so still straightforward.
Driven a few miles. Now the pump has spent these miles labouring on diluted fuel. How hard the car was driven matters as much as how far, and the work takes in that tank, your lines, the filter and clean fuel through the entire system. Driving the children to Robert Ferguson Primary School is one sort of trip. Driving as far as Carlisle, under a mile away, makes a very different job — as does any distance on the M6, under 3 miles from Denton Holme, with the engine running hard all the way.
Clattering, an uneven idle, smoke, a throttle gone soft: driven until it complained. The fuel is not behaving like diesel any more, and the motor is telling you. Whether it's the verge on Morley Street, a lay-by or a side street, stop where you are and leave it. Lasting damage is very uncommon when a car is pulled over quickly, and the drain and flush that still come first take care of it.
Petrol in a diesel stories Denton Holme motorists 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 just holds more of the same blend. A diesel fuel system doesn't accept petrol by percentage in the way that guidance assumes.
"Newer diesels can handle a little petrol" — a myth, and closer to the opposite. At higher pressure, through smaller parts: that's how a newer diesel moves its fuel, and so the protection counts for more, not less.
Myth: "If it starts and drives, there is no damage done." This is the one that catches people. Diesel in a petrol motor generally leaves a motor that won't run: the driver stops, and so does the damage. 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. 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 different problem. None of what petrol thinned gets put back by it — and later, your tank still contains that petrol.
Once the motor has been run, part of the petrol sits in your filter and your lines, not the tank — and the next start sends it straight back through your pump. So the myth "drain your tank yourself and you are sorted" does not stand up. It is also truly dangerous to drain petrol into a can at the roadside.
Petrol in a diesel: how does it occur?
A careless moment is rarely the cause, and no one means to do it. One way only, since of the nozzles: the smaller petrol one slips inside a diesel filler with almost no resistance, while the diesel one mostly will not fit a petrol car. That's how the forecourt makes it straightforward.
It takes place when habit and your car stop matching. Hire cars, courtesy cars, and vehicles that are new to you. Two vehicles on one driveway, one petrol, one diesel. A well-known forecourt with the pumps in a different order. Fuelling up in a rush en route to Carlisle, with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Passat in front of you on the forecourt for its first tank — that is when. Your hand repeats what it has always done when you add rain, a phone call or a back seat full of kids.
Preventing petrol in a diesel next time you fill up around Denton Holme
- Read the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, yet not on every forecourt. The label is what counts.
- Plenty of vehicles state the fuel inside the filler flap or on the cap, and so check it on the first fill in any vehicle you do not know.
- One of each in the home? Label your key to your diesel — a coloured fob, a sticker — because intending to remember is not enough.
- It seems daft and it does the trick: on your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump.
- Tuck the phone away. This is an easy mistake to make whilst you are thinking about something else.
- Some diesels come with a filler designed to block a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the petrol pump.
- The moment you realise, stop: less petrol inside the tank means a thinner mix. What to do next doesn't change, though — still do not fire it up.
Denton Holme: already put petrol in a diesel?
Short and simple, then, is the order of things. Leave it unstarted, with your ignition switched off as well. Ask the attendants to help you roll it clear of the petrol pump if you're still at the forecourt, whether that is JET or somewhere else. Then call 0333 366 0103 and tell us what was put in, about how much, and whether it has run.
If it was AdBlue instead of petrol, say so. That's a different issue — corrosion and deposits and not lost lubrication — and it has its own page for Denton Holme.
What makes one Denton Holme petrol in a diesel job cost more than the next
There is no honest single quote for this, since the four scenarios above are four separate tasks. Which of them you are in is chiefly what moves your cost. Two things follow that: the petrol that was put in as a share of what that tank holds, then the spot the car is in and whether our van can reach it safely.
That is why we ask three queries before quoting instead of after: what was put in, how much, and whether it has run. The answers turn a range into a straight figure.
About Denton Holme itself
Denton Holme is a suburban area located on the riverside in Cumbria, with a mix of terraced housing and a population of around 5921 residents. Denton Holme sits near the city of Carlisle, being only 0.5 miles away, and is close to other nearby places such as Caldewgate and Longsowerby. Denton Holme is situated at a relatively low elevation of 17 metres above sea level, in a region of northwest England. Denton Holme is part of the wider Carlisle urban area, which is around 260.9 miles from London.
Fuel drain cover around Denton Holme and across Cumbria
Caldewgate, Longsowerby and Carlisle are among the places near Denton Holme that the same vans work, answering petrol in diesel jobs across Denton Holme's CA postcode area. 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 Denton Holme and still at the petrol pump?
Nothing beats it: that's where you are. Turned off it stays; then ring.