How Worried Should You Be? Petrol in a Diesel Car in Hope
If it has not been started, worry far less than you likely are. Petrol resting in a diesel tank does nothing to the engine till something pulls it through the fuel system — the ignition priming the pump, your starter, or the drive itself. So the fair answer to the first question everyone in Hope asks, "have I wrecked it?", is usually no. Petrol in Diesel is who to call, with your motor left off, so it stays that way. The rest of this page covers what petrol really does to a diesel, how to tell how far it has got, and how to make sure it does not happen to you again.
What petrol in a diesel does to the engine
Diesel has two jobs on its way through a motor. It lubricates to begin with, and only then does it burn. Made to very fine gaps, the fuel injectors and the pump depend on the diesel flowing through them to stop their surfaces wearing against one another.
The second job petrol doesn't do at all, and the first it does badly. The clattering comes from petrol being designed not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips away the protection your system rests on, and any pump running on such a blend is wearing itself.
Put those together and the shape of the problem is clear. It is movement that causes the damage, not contact. Any tank with petrol in it is a fuel problem. Whatever a worn pump sheds travels on, carried by the fuel, into the injectors further along, which is why a pump that has worked on the petrol is where a mechanical problem starts.
Hope, petrol in a diesel: four cases, from mild to significant
The best case there is: filled up, not once started. Only that tank has petrol in it, so the task is emptying your tank and purging the fuel system where the vehicle sits. This situation can only truly take place on a forecourt: anywhere else, the car got there by being driven.
Ignition on, or started for a moment. Petrol has come out of your tank and got to your filter and the lines, because the fuel system has been bled. Usually nothing more than emptying, purging and seeing to the fuel filter, so still straightforward.
Some miles driven, and the pump has spent each of them running on thinned fuel. Tank, lines, filter, then clean fuel put through the whole circuit: that's the work, and the way the car was driven matters as much as the mileage. Short trips, like the school run to Dodleston CofE Primary School, are one thing. Any distance on the M56, under 10 miles from Hope, means the motor has worked hard throughout, and a run to Wrexham, under 10 miles away, makes a very different job as well.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone ragged. That is the motor telling you its fuel has stopped behaving like diesel. Stop wherever you are — the verge on Hawarden Road, a lay-by, a side street — and leave the car there. The fuel drain and flush still go first, and they take care of it: when a car is stopped soon, long-term damage is very unusual.
Hope people and the petrol in a diesel stories they hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. Topping up removes nothing; it gives you a bigger tank of the same mix. The idea behind the advice — that diesel fuel systems accept petrol by percentage — is wrong.
If anything, the opposite holds. Myth: "A modern diesel can cope with a bit of petrol." A modern diesel sends its fuel through finer parts at higher pressure, which makes the protection count more, not less.
"It starts, it drives, and so there is no harm" — the myth that trips up more people than any other. The driver of a petrol motor fed diesel normally stops, since it will not run, and the damage stops there. Feed petrol to a diesel and it normally fires up, idles and pulls away like nothing happened — all the while its pump wears. Running isn't the same as fine.
Myth: "Add some two-stroke oil and drive the car home." It is an outdated fix for a distinct issue. None of what petrol thinned gets put back by it — and afterwards, your tank still holds that petrol.
If the engine has been run, part of that petrol is in your filter and your lines, not that tank — and your next start sends it straight back through the pump. So the myth "drain that tank yourself and you are sorted" does not hold. On top of that, petrol drained into a can by the road is genuinely hazardous.
How does petrol in a diesel take place?
Carelessness is seldom the cause, and nobody means to do it. The petrol nozzle is the smaller of the two and slips into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol car at all. The forecourt makes it simple, and the error runs one way.
The moment routine stops matching the car is the moment it occurs. A motor that's new to you — a hire car, on loan as a courtesy car, or just bought. Households running one of each, petrol and diesel. Your ordinary forecourt, its pumps now in a different order. A rushed fill on the way to Hope (Flintshire) with a train to catch. Years of petrol vehicles behind you, a diesel Skoda Octavia in front of you on the forecourt for its first tank — that's when. With rain, a call coming in, or children to deal with, the hand just does what it has always done.
Avoiding petrol in a diesel next time you fill up around Hope
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, though most usually do. Read the petrol pump's label; the colour is only a hint.
- Plenty of vehicles state the fuel type inside the filler flap or on the cap, and so check there on the first fill in a vehicle you don't know.
- A coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember, for a house with one of each.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump. It seems silly and it does the trick.
- Put the phone away. This is an easy mistake to make while you're thinking about something else.
- Some diesels have a filler built to reject a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the pump.
- Stop the moment you notice. Less petrol in the tank makes a weaker blend. It does not change what to do next, which is still not to crank it.
Hope: already put petrol in a diesel?
Short and simple, then, is the order of things. Don't switch the ignition on, and do not crank it. Ask the attendants to help you roll it clear of the pump if you are still on the forecourt, whether that's Gulf or somewhere else. Next, 0333 366 0103. We will ask what was put in, about how much, and if it has been run.
Say so if it was AdBlue instead of petrol: it's a separate problem, with its own page for Hope, because AdBlue brings corrosion and deposits rather than lost lubrication.
Hope petrol in a diesel jobs: why one costs more than another
An honest single quote doesn't exist here: four scenarios, four separate jobs. What shifts the cost is mostly which of them you are in. The ratio counts next, meaning how much of your tank is petrol, followed by the location of the car and whether reaching it is safe for a van.
That is why we ask three questions before costing rather than after: what was put in, how much, and whether it has run. Given the answers, there is a straight figure rather than a range.
About Hope itself
Hope is a village situated on the riverside in Flintshire, Wales, with an elevation of 87 metres above sea level. Hope lies approximately 5 miles from Wrexham and is surrounded by nearby places such as Caergwrle and Bridge End. Hope has a population of around 1317 people and predominantly consists of semi-detached housing. Hope is located near the Welsh-English border, about 165 miles from London.
Hope and Flintshire: where our fuel drain cover reaches
Petrol in diesel call-outs around Hope — part of the LL postcode area — go to vans that likewise cover the spots round it, Caergwrle, Bridge End and Talwrn included. You need not move the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all places we drain.
In Hope and still at the pump?
Then you are in the best place there is. Keep it off. Call.