How Worried Should You Be? Petrol in a Diesel Car in West End
Provided it hasn't been started, worry less than you probably are. Petrol resting in a diesel tank does nothing to your engine till something draws it through the system — your ignition priming the pump, the starter, or driving itself. So the honest answer to the first query anyone in West End asks, "have I wrecked it?", is usually no. Leave the motor off and call Petrol in Diesel — that is how you keep it that way. The remainder of this page sets out what petrol really does to a diesel, how to tell how far it has got, and how to make sure it doesn't happen to you again.
Petrol in a diesel: what does it do to your engine?
On its way through an engine, diesel does two tasks. Before it burns, it lubricates — then it ignites. Very fine gaps are built into your injectors and your high-pressure pump, and only your diesel running through stops their surfaces grinding together.
Badly at the first, not at all at the second: that's petrol. 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 the system hinges on, and any pump running on such a blend is wearing itself.
Combined, those make the shape of the trouble clear. Not contact but circulation is what does the harm. All a tank with petrol in it amounts to is a fuel issue. The start of a mechanical problem is a pump that has been labouring on that petrol — and whatever a worn pump sheds moves on with the fuel to the injectors downstream.
Petrol in a diesel around West End: how bad is it? Four cases
Filled but never started — the best it gets. That petrol is inside the tank and just that tank, and the task is a drain and a flush where the car sits. This is the one situation that can only really happen on a forecourt, because anywhere else the car has been driven to get there.
A moment's running, or just the ignition on. The fuel system has been primed, and so petrol has left the tank and got to the filter and the lines. That is generally still a simple job — a drain, a flush, and the filter dealt with.
Some miles driven, and the pump has spent each of them running on weakened fuel. How hard your car was driven counts as much as how far, and the work covers the tank, your lines, your filter and clean fuel through the entire system. The school run to the local primary school is one thing. Driving as far as Bangor, under a mile away, makes a very different task — as does any mileage on the Moreton Spur, under 50 miles from West End, with the engine labouring hard all the way.
Driven till it protested. Clattering, an uneven idle, smoke, a throttle that has gone soft. What you are hearing is the engine reporting fuel that no longer behaves like diesel. Pull up wherever you are — the verge on Ffordd Euston, a lay-by, a side street — and leave it where it is. A vehicle pulled over quickly very seldom has permanent damage, because the drain and the flush, which still come first, deal with it.
Petrol in a diesel stories West End drivers hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Topping up removes nothing; it gives you a bigger tank of the same mixture. That guidance presumes a diesel fuel system tolerates petrol by percentage. It does not.
If anything, the reverse holds. Myth: "A current diesel can cope with a bit of petrol." Protection matters more on newer diesels, not less, since their fuel passes through finer components at higher pressure.
Myth: "If it starts and drives, there is no harm done." This is the one that catches motorists. The driver of a petrol engine fed diesel normally stops, because it will not run, and the damage stops with them. Feed petrol to a diesel and it generally starts, ticks over and pulls away like nothing has happened — all while its pump wears. Being able to run is not proof of being fine.
Myth: "Add some two-stroke oil and drive the vehicle home." It is an outdated fix for a distinct issue. None of what petrol weakened gets put back by it — and later, your tank still contains the petrol.
If your engine has been run, part of that petrol is in the filter and your lines, not the tank — and the next start pulls it right back through your pump. So the myth "drain the tank yourself and you are sorted" does not stand up. Draining petrol into a can at the roadside is also truly hazardous.
How it happens: petrol in a diesel
On purpose? Never. Through carelessness? Seldom, if ever. The forecourt makes it easy: the petrol nozzle is the narrower of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle mostly won't go into a petrol vehicle at all. So the mistake runs one way.
It happens when routine and the car stop matching. Courtesy car, hire car, or a vehicle that's brand new. Two vehicles on one drive, one petrol, one diesel. A forecourt you know, only with its pumps laid out differently. A train to catch, and a rushed fill on the way to Bangor (Gwynedd). Years of petrol vehicles behind you, a diesel Volkswagen Golf in front of you at the forecourt for its first tank — that's when. Your hand does what it has always done once you add rain, a phone call or a back seat full of kids.
West End people: how to avoid petrol in a diesel next time
- A green handle for unleaded and black for diesel is usual in the UK — yet not on each forecourt. Trust the label on the petrol pump, not the colour.
- In a motor you don't know, look inside the flap over your filler or at the cap before your first fill: plenty of motors state the fuel there.
- One of each in the household? Mark the key to your diesel — a bright fob, a sticker — because meaning to remember is not enough.
- It seems silly and it works: on the first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump.
- Thinking about something else is when this becomes an easy mistake to make, and so put the phone away and keep your mind on the petrol pump.
- Some diesels come with a filler designed to block a petrol nozzle, and devices you can add exist for motors without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the petrol pump.
- Stop the moment you notice. Less petrol in the tank makes a weaker mixture. It doesn't change what to do next, which is still not to crank it.
Put petrol in a diesel in West End already?
Then the order of things is brief. Do not turn your ignition on, and don't fire it up. If you're still on the forecourt — Asda or anywhere else — ask the attendants to help you roll it away from the petrol pump. Next, 0333 366 0103. We will ask what went in, roughly how much, and if it's been run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a separate issue — West End has a page all for it.
One petrol in a diesel task around West End costs more than another. Why?
Four different tasks lie behind the four scenarios above — which is why there's no honest single quote. Which of them you're in is mostly what moves the cost. Two things come after that: the petrol that went in as a share of what your 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 went in, how much, has it run — and this is the reason. Given the replies, you get a straight figure rather than a range.
About West End and its setting
West End is a suburban area located on the coast of Gwynedd in Wales, situated near the city of Bangor. West End sits at an elevation of 33 metres, with its terraced housing stock reflecting the area's historical development. West End is close to nearby places such as Glan-Adda, Minffordd, and Bryn-Llwyd, and is home to a population of approximately 5768 residents.
Fuel drain cover across Gwynedd, West End included
Petrol in diesel calls around West End — part of the LL postcode area — go to teams that likewise cover the locations around it, Glan-Adda, Minffordd and Bryn-Llwyd included. Our engineers drain wherever your car is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
In West End and still at the petrol pump?
Then you're in the best place there can be. Switched off it stays; then phone.