How Worried Should You Be? Petrol in a Diesel Car in Shaw Edge
Provided it hasn't been started, worry less than you likely are. Everyone in Shaw Edge starts with "have I wrecked it?", and the honest answer is normally no: petrol resting inside your tank of a diesel stays harmless until priming, cranking or driving draws it into your fuel system. To leave the vehicle that way, phone Petrol in Diesel then leave the motor switched off. What petrol actually does to a diesel, how to gauge how far it's gone, and how to stop it from happening a second time: that's the rest of this page.
What petrol in a diesel does to the engine
Passing through an engine, diesel is doing two things at the same time. Oiling comes before burning; it does both. Very fine clearances go into your injectors and the high-pressure fuel pump, and only the diesel running through stops their surfaces grinding together.
Of those two tasks, petrol handles the first badly and the second never. It's runnier than diesel and takes away the lubrication the fuel system rests on, and so a pump running on a petrol mixture is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That is where the rattling comes from.
Put these together and the shape of the problem is clear. Contact doesn't do the harm — movement does. All a tank with petrol in it amounts to is a fuel issue. After your pump has been working on that petrol, a mechanical fault has started: whatever is shed by a pump that is wearing down travels onward to the injectors with your fuel.
Shaw Edge, petrol in a diesel: four cases, from mild to significant
Fuelled but not once started — as good as it gets. Just your tank has petrol in it, so the job is draining your tank and cleaning the system where your car stands. This situation can only really take place at a forecourt: anywhere else, the car got there by being driven.
Started for a second, or just the ignition on. Petrol has left that tank and reached the filter and the lines, because the fuel system has been bled. Drain, flush, see to the fuel filter: still usually simple.
The pump now worked a few miles on diluted fuel — that's what driving it does. Tank, lines, filter, then clean fuel run through the whole circuit: that's the work, and the way your car was driven matters as much as the distance. A school run to St Joseph's RC Junior, Infant and Nursery School, A Voluntary Academy is one thing. Any mileage on the A627(M), under 3 miles from Shaw Edge, means the motor working hard throughout, and a run to Manchester, under 10 miles away, makes a very different job as well.
Driven till it complained. Clattering, a lumpy idle, smoke, a throttle that has gone soft. The fuel is not behaving like diesel any more, and the engine is telling you. Stop where you are — on the verge on Marches Close, at the kerb, down a side road — and don't move it. What comes first is still the drain and flush-through, and that sorts it out, with long-term damage very unusual when a vehicle is pulled over soon.
Shaw Edge drivers and the petrol in a diesel stories they hear
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Nothing is removed by topping up — you're left with a fuller tank, still the same mix. A diesel fuel system does not tolerate petrol by percentage in the way that advice supposes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the reverse. Finer components and higher pressure are the way a current diesel runs its fuel, and that makes the protection count more, not less.
This is the one that fools drivers. Myth: "If it starts and drives, there is no damage done." Any petrol motor fed diesel normally will not run, so the driver stops and the damage stops with them. While your pump wears, a diesel fed petrol usually starts, ticks over and drives away as if nothing has happened. Being able to run is not proof of being fine.
An old fix for a distinct problem is behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." What petrol has diluted remains thinned, and that petrol stays in your tank regardless.
Myth: "Drain that tank yourself and you're sorted." After the engine has run, some of the petrol is no longer in the tank: it is in your filter and the lines, and it goes straight back through your pump on the next start. Draining petrol into a can by the kerbside is also truly dangerous.
Why petrol in a diesel occurs at all
No one does it on purpose, and it is rarely carelessness. One way only, because of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one mostly will not fit a petrol vehicle. That is how the forecourt makes it easy.
It occurs when habit and the car stop matching. Courtesy car, hire car, or a motor that is new. Two vehicles on one drive, one petrol, one diesel. A well-known forecourt with the pumps in a different order. Fuelling up in a hurry en route to Mills Hill, with a train to catch. Years of petrol cars behind you, a diesel Volkswagen Passat in front of you at the forecourt for its first tank — that is when. Your hand does what it has always done when you add rain, a phone call or a back seat full of kids.
How to prevent petrol in a diesel on your next fill-up around Shaw Edge
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most usually do. Read the petrol pump's label; the colour is only a hint.
- Check the filler flap. Plenty of motors state the fuel type inside the flap or on the cap. Look at it on the first fill in a car you don't know.
- A coloured fob or a sticker on your diesel's key achieves more than any amount of meaning to remember, for a home 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 lift the nozzle off the pump. It seems daft and it works.
- While you're thinking about something else, this is an easy mistake to make — so put your phone away.
- Some diesels come with a filler built to block a petrol nozzle, and devices you can add are available for vehicles without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop reading the petrol pump.
- As soon as you notice, stop: less petrol in that tank means a weaker blend. What to do next does not change, though — still don't crank it.
Put petrol in a diesel in Shaw Edge already?
The order of things is brief, then. Do not switch the ignition on, and don't crank it. Still on the forecourt, at Shell or anywhere else? Ask the staff to help you roll the vehicle clear of the petrol pump. Next, 0333 366 0103. We will ask what was put in, roughly how much, and if it has been run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost protection, make it a separate fault — Shaw Edge has a page just for it.
Shaw Edge petrol in a diesel tasks: why one costs more than another
There's no honest single quote for this, because the four scenarios above are four different tasks. Which of them you are in is mostly what shifts your cost. After that it is the share — how much petrol went in against how much that tank takes — and after that where the vehicle is and whether a van can get to it safely.
Three questions come first, before any quote, instead of after — what went in, how much, has it run — and that is the reason. Their answers are what turn a range into one firm number.
About Shaw Edge, briefly
Shaw Edge is a suburban area in Greater Manchester, situated near the River Beal and characterised by its terraced housing stock. Shaw Edge sits at an elevation of 195 metres, overlooking the surrounding countryside and located approximately 8.6 miles from Manchester. Shaw Edge forms part of a network of residential communities including Shaw Side, Heyside, and Brownlow, which together contribute to the urban landscape of the region.
Shaw Edge and Greater Manchester: where our fuel drain cover reaches
Shaw Edge sits in the OL postcode area, and our vans that answer petrol in diesel call-outs there work the spots around it as well — Shaw Side, Heyside and Brownlow among them. You need not move the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all locations where we work.
Shaw Edge: still at the pump?
Then you are in the best spot there can be. Ring, and keep it turned off.