How Worried Should You Be? Petrol in a Diesel Car in Court Hey
Probably less than you are now — provided no one has started it. "Have I wrecked it?" is the first thing everyone around Court Hey asks, and the truthful answer is normally no, since petrol resting in a diesel tank hurts nothing until it is dragged through the fuel system — by ignition priming, by your starter, or by driving. Leave the engine off then call Petrol in Diesel — that keeps it that way. Keep reading for three things: the effect petrol has inside a diesel engine, the signs of how far it has got, and ways to make sure you don't repeat it.
Inside the motor: what petrol in a diesel does
On its way through an engine, diesel does two jobs. It ignites, and before it burns it lubricates. Made to extremely fine gaps, the injectors and the pump depend on your diesel flowing through them to stop their surfaces wearing against one another.
Badly at the first, not at all at the second: that's petrol. It is runnier than diesel and takes away the lubrication the system hinges on, and so a pump running on a petrol mixture is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That's where the rattling comes from.
The shape of the problem is clear once you put those together. The damage is done by circulation, not by contact. Petrol in a tank is a fuel issue. Whatever a worn pump sheds goes on, borne by your fuel, into your injectors downstream, which is why a pump that has been working on that petrol is where a mechanical issue begins.
Petrol in a diesel around Court Hey: how serious is it? Four situations
Filled up, not once started. The best case there can be. Only the tank has petrol in it, and so the job is clearing the tank and flushing the system where the car stands. This situation can only truly take place on a forecourt: anywhere else, your car got there by being driven.
Ignition on, or started for a second. The fuel system has been bled, and so petrol has left that tank and got to the fuel filter and the lines. Still generally easy: drain, flush, and the fuel filter dealt with.
Those few miles driven meant the pump labouring on fuel weakened by petrol the whole way. The work is your tank, your lines, the fuel filter and fresh fuel through the entire circuit, and how hard the vehicle was driven matters as much as how far. Driving the children to Malvern Primary School is one sort of trip. Any mileage on the M62, under a mile from Court Hey, means the engine working hard throughout, and a run to Liverpool, under 5 miles away, is a very different task as well.
It protested, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone uneven. The motor is telling you the fuel is no longer acting like diesel. Stop on the spot — on the verge on Thornton Road, at the kerb, down a side road — and do not move it again. The fuel drain and flush still go first, and they deal with it: when a vehicle is pulled over soon, lasting damage is very uncommon.
Myths Court Hey drivers hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Topping up removes nothing; it gives you a bigger tank of the same mix. The idea behind that advice — that diesel fuel systems accept petrol by percentage — is wrong.
If anything, the reverse is true. Myth: "A newer diesel can cope with a bit of petrol." A current diesel sends its fuel through more precise components at higher pressure, which makes the protection matter more, not less.
"It starts, it drives, and so there is no harm" — the myth that catches most motorists than any other. Diesel in a petrol motor generally leaves a motor that will not run: the driver stops, and so does the harm. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile your pump wears. Running isn't the same as fine.
Myth: "Add some two-stroke oil and drive the vehicle home." It's an old workaround for a different fault. The petrol is still inside your tank after that, and what it has thinned is not put back.
"Drain it yourself and you are sorted" — a myth, because after it's been running some petrol lies in your filter and lines, ready to go straight back through your pump at your next start. Besides, petrol emptied into a can by the road is genuinely dangerous.
Petrol in a diesel: how does it occur?
It is seldom carelessness, and nobody does it on purpose. One way only, because of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one generally will not fit a petrol motor. That is how the forecourt makes it simple.
Routine and your car falling out of step is when it happens. Hire cars, courtesy cars, and motors that are new to you. Two cars on one driveway, one petrol, one diesel. The pumps in a different order on a well-known forecourt. A train to catch, and a rushed fill en route to Broad Green. A new-to-you diesel Volkswagen Golf, its first fuelling, and a driver accustomed to petrol: exactly when it takes place. Add rain, a phone call or a back seat full of kids, and your hand repeats what it has always done.
Court Hey motorists: how to prevent petrol in a diesel next time
- The label is what matters, and so check the petrol pump rather than the colour: in the UK unleaded handles are usually green and diesel black, yet not on each forecourt.
- Check the filler flap. Many vehicles state the fuel inside the flap or on the cap. Look at it on the first fill in any vehicle you do not know.
- A coloured fob or a sticker on the diesel's key does more than any amount of intending to remember, in a home with one of each.
- Before the nozzle comes off the petrol pump the first time you fuel a hired or new car, say "diesel" out loud. Silly, perhaps, yet it does the trick.
- Put the phone away. This is an easy mistake to make while you're thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler built to block a petrol nozzle, and add-on devices are available for the rest. Count it as a safety net, and keep checking the pump.
- Stop the moment you realise. Less petrol in your tank means a weaker mix. It does not change what to do next, which is still not to fire it up.
Petrol already in a diesel in Court Hey? Start here
Short and simple, then, is the order of things. Starting it is out, and so is turning on your ignition. Yet at the forecourt, at Shell or anywhere else? Ask the staff to help you push the vehicle clear of the petrol pump. Then phone 0333 366 0103 and tell us what was put in, about how much, and if it has run.
Corrosion and deposits are the problem with AdBlue, where petrol brings lost lubrication. So if it was AdBlue, say so — and read its own Court Hey page.
What makes one Court Hey petrol in a diesel job cost more than the next
Four different tasks lie behind the four scenarios above — which is why there is no fair single quote. The situation itself does most of the work of moving your cost. Next it's the proportion — how much petrol went in against how much that tank takes — and then where the car is and whether a technician can get to it safely.
Three questions come first, before any quote, instead of after — what went in, how much, has it run — and this is the reason. Given those answers, you get a straight figure rather than a range.
About Court Hey itself
Court Hey is a suburban area in Merseyside, situated near the River Alt and close to the city of Liverpool. Court Hey has a mix of semi-detached housing and local amenities, with nearby green spaces such as Bowring Park. Court Hey is located at a relatively low elevation of around 35 metres above sea level, and is part of the larger Liverpool urban area. Court Hey is also near other suburban areas, including Broad Green and Dovecot.
Fuel drain cover across Merseyside, Court Hey included
Bowring Park, Broad Green and Dovecot are among the spots around Court Hey that the same vans work, answering petrol in diesel jobs across Court Hey's L postcode area. The vehicle doesn't need to come to us: our engineers drain on a forecourt, in a supermarket car park, in a lay-by or on your own drive.
Court Hey: still at the pump?
The best spot there is, then — that's where you are. Phone, and leave it switched off.