Should You Worry? Petrol in a Diesel Car in Shore Edge
Probably less than you already are — as long as nobody has started the vehicle. Everyone in Shore Edge starts with "have I wrecked it?", and the honest answer is normally no: petrol left inside your tank of a diesel stays harmless till priming, cranking or driving draws it into the fuel system. Leave the motor off then call Petrol in Diesel — that keeps it like that. What petrol really does to a diesel, how to gauge how far it's travelled, and how to keep it from happening again: that's the rest of this page.
Petrol in a diesel: what does it do to the engine?
Passing through a motor, diesel is doing two things at the same time. It lubricates first, and only then does it burn. Extremely fine gaps are built into the injectors and the high-pressure fuel pump, and only your diesel running through keeps those surfaces from grinding together.
Badly at the first, not at all at the second: that is petrol. It is runnier than diesel and removes the protection the system hinges on, and so a pump running on a petrol mix 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 clattering comes from.
The shape of the issue is plain when you put those together. It's circulation that does the damage, not contact. Where that petrol is only in your tank, it's an issue of fuel, nothing more. The beginning of a mechanical one is a pump that has been working on that petrol — and whatever a worn pump sheds travels on with the fuel to the fuel injectors downstream.
How serious is petrol in a diesel? Four scenarios we see in Shore Edge
The best case there can be: filled up, not once started. Just that tank has petrol in it, and so the job is clearing that tank and rinsing your system where the vehicle stands. This situation can only really happen on a forecourt: anywhere else, the vehicle got there by being driven.
The ignition switched on, or a short start. Petrol has come out of that tank and reached the filter and your lines, because the system has been primed. Normally little more than clearing, rinsing and seeing to your filter, so still easy.
Those few miles on the road were the pump working on fuel diluted by petrol throughout. Tank, lines, filter, then fresh fuel run through the entire system: that's this work, and the way the vehicle was driven counts as much as the distance. Short trips, such as the school run to Buckstones Primary School, are one matter. Getting as far as Manchester, under 15 miles away, makes a very different task — as does any miles on the M62, under 3 miles from Shore Edge, with the engine running hard the whole time.
It protested, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone lumpy. The fuel is not acting like diesel any more, and the motor is saying so. Whether it is the verge on Golden Street, a lay-by or a side street, stop there then leave it. The drain and flush still go first, and they sort it out: if a car is pulled over soon, lasting damage is very unusual.
What Shore Edge drivers get told about petrol in a diesel — and the stories in it
Myth: topping up to full with diesel makes it fine. It doesn't. Nothing comes out when you top up — the tank just carries more of the same mixture. A diesel fuel system doesn't tolerate petrol by percentage in the way that advice assumes.
"Current diesels can handle a little petrol" — a myth, and nearer the opposite. More precise parts and higher pressure are the way a modern diesel runs its fuel, and that makes the lubrication count more, not less.
One myth that catches drivers out: if it starts and drives, it must be unharmed. Diesel in a petrol motor normally means a motor that will not run: the motorist stops, and so does the damage. Feed petrol to a diesel and it normally starts, ticks over and pulls away as if nothing has happened — all the while its pump is wearing. Fine and running are not the same thing.
Myth: "Add some two-stroke oil and drive the vehicle home." It's an outdated fix for a separate fault. It doesn't put back what petrol has diluted, and that petrol is still in the tank later.
The next start sends petrol back round the pump out of the lines and the fuel filter, where some of that ends up once the motor has run. That's why a DIY tank drain does not leave you sorted — a myth. And, a can of petrol filled at the roadside is truly dangerous.
How does petrol in a diesel occur?
Nobody does it on purpose, and it's rarely carelessness. One way only, because of the nozzles: the slimmer petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one generally won't fit a petrol car. That is how the forecourt makes it straightforward.
The moment routine stops matching the car is the moment it takes place. Hire cars, courtesy cars, and vehicles that are new to you. One petrol and one diesel on the drive of the same household. The pumps in a different order on a familiar forecourt. Filling up in a hurry on the way to Rochdale, with a train to catch. Precisely the moment it happens: after years of driving petrol, a driver fills a diesel Renault Megane for the first time. Add rain, a phone call or a back seat full of children, and your hand does what it has always done.
Preventing petrol in a diesel next time you fill up in Shore Edge
- Not every forecourt in the UK follows green for unleaded and black for diesel, though most generally do. Check the pump's label; the colour is only a hint.
- Check the filler flap. Plenty of motors state the fuel inside the flap or on the cap. Look at it on the first fill in any vehicle you do not know.
- Mark the key. In a home with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the pump. It sounds daft and it does the trick.
- Mistakes like this are simple to make whilst your mind is on something else, so the phone goes away.
- Some diesels have a filler built to refuse a petrol nozzle, and devices you can add exist for vehicles without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the pump.
- Noticing it mid-fill? Stop at once. A weaker blend follows from less petrol inside that tank, but your next stage remains the same: don't fire it up.
Petrol already in a diesel around Shore Edge? Start here
The order of things is brief, then. Don't switch the ignition on, and don't crank it. Ask the attendants to help you push it away from the pump if you are still at the forecourt, whether that is Shell or anywhere else. Then call 0333 366 0103 and tell us what was put in, roughly how much, and whether it has run.
Say so if it was AdBlue instead of petrol: it is a separate problem, with its own page for Shore Edge, because AdBlue brings corrosion and deposits instead of lost lubrication.
One petrol in a diesel job around Shore Edge costs more than another. Why?
There's no honest single quote for this, since the four scenarios above are four different jobs. Mostly, the cost moves with which situation you are in. Where the car is counts too, and whether a technician can safely reach it, after the share of petrol to what the tank holds.
What got in, how much, and if it has run — three queries our technicians ask before pricing, not after, for precisely that reason. Given those replies, you get a straight figure instead of a range.
About Shore Edge, for a moment
Shore Edge is a suburban area situated on the lakeside in Greater Manchester, with an elevation of 223 metres. Shore Edge lies approximately 10 miles north of Manchester and 165 miles northwest of London, surrounded by nearby places such as Black Clough and Crompton Fold. Shore Edge has a population of around 2926 residents, predominantly living in semi-detached housing. Shore Edge benefits from its scenic lakeside setting, which offers attractive views and outdoor recreational opportunities.
Across Greater Manchester and around Shore Edge: fuel drain cover
Petrol in diesel jobs in Shore Edge — part of the OL postcode area — go to vans that also cover the places round it, Black Clough, Crompton Fold and Top o th Knowl included. A forecourt, a supermarket car park, a lay-by or your own driveway are all locations we work, and the vehicle does not need to move to us.
Shore Edge: still at the petrol pump?
The best position there is, then — that is where you are. Switched off it remains; then phone.