Broughton in Furness: Petrol in a Diesel Car? How Worried to Be
Probably less than you already are — provided no one has started the vehicle. Till the ignition primes the pump, your starter cranks, or the vehicle is driven, petrol in a diesel tank just rests there and does nothing. Which means the truthful reply to the first Broughton in Furness query — "have I ruined it?" — usually no. To leave it that way, phone Petrol in Diesel and leave your engine alone. 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 doesn't happen to you a second time.
Inside the engine: what petrol in a diesel does
On its way through an engine, diesel does two tasks. It ignites, and before it burns it lubricates. Built to very fine gaps, the fuel injectors and the pump depend on your diesel flowing through them to keep their surfaces from wearing against one another.
The second job petrol doesn't do at all, and the first it does badly. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, so a pump running on the blend wearing itself. It's equally made to resist igniting under compression — the opposite of what a diesel needs — which is where you hear the knocking.
The shape of the trouble is clear when you put those together. Not contact but movement is what causes the damage. All a tank with petrol in it amounts to is a fuel fault. The start of a mechanical one is a pump that has been labouring on that petrol — and whatever a worn pump sheds moves on with the fuel to the fuel injectors downstream.
Four situations our technicians see in Broughton in Furness: how serious is petrol in a diesel?
Fuelled but never started — the best it gets. On a forecourt, and truly only there, that petrol is still limited to the tank — because everywhere else the vehicle was driven to get to it. The task is draining and rinsing on the spot.
Your ignition switched on, or a short start. Petrol has come out of the tank and got to the filter and the fuel lines, since the system has been bled. That's usually still an easy job — a drain, a flush, and your filter seen to.
Your pump now worked a few miles on thinned fuel — that is what driving the car does. Mileage is only half of that; how hard it was driven counts just as much. Either way this work includes your tank, your lines, your filter and fresh fuel through the whole circuit. A school run to Broughton CofE Primary and Nursery School is one thing. Any distance on the M6, under 25 miles from Broughton in Furness, means your engine has worked hard throughout, and a run to Lancaster, under 25 miles away, makes a very different job as well.
Driven until it complained. Rattling, an uneven idle, smoke, a throttle that has gone soft. That's the motor telling you its fuel no longer is behaving like diesel. Pull up wherever you are — the verge on Station Road, a lay-by, a side street — then leave the car where it is. Permanent damage is very uncommon if a car is pulled over early, and the drain and flush that still come first deal with it.
Broughton in Furness drivers and that petrol in a diesel myths they hear
False: topping up to full with diesel makes it fine. It doesn't. Nothing comes out when you top up — that tank simply carries more of the same blend. That advice assumes a diesel fuel system tolerates petrol by percentage. It doesn't.
Myth: "A newer diesel can cope with a bit of petrol." If anything, the opposite. At higher pressure, through finer components: that's how a current diesel moves its fuel, so the lubrication matters for more, not less.
This is the one that catches motorists. Myth: "If it starts and drives, there's no harm done." The driver of a petrol engine fed diesel usually stops, because it will not run, and the damage stops with them. A diesel fed petrol generally starts, ticks over and drives away as though nothing has happened, whilst the pump wears. Running is not the same as fine.
Myth: a two-stroke additive lets you to drive home. It was an old fix, supposed for another issue. None of what petrol diluted is put back by it — and later, your tank still holds that petrol.
"Drain it yourself and you are sorted" — a myth, because after it has been running some petrol sits in the filter and lines, waiting to go straight back through the pump on the next start. Clearing petrol into a can by the kerbside is also truly hazardous.
Petrol in a diesel: how does it happen?
No one does it on purpose, and it's seldom carelessness. A diesel nozzle mostly will not fit a petrol vehicle, but the slimmer petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one error easy, and just in that direction.
It happens when routine and your car stop matching. Hire cars, courtesy cars, and cars that are new to you. A household with one petrol and one diesel on the driveway. The pumps in a different order on a familiar forecourt. Rushing for a train at Foxfield and filling up en route. Years of petrol motors behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that's when. With rain, a call arriving, or a car full of children to deal with, the hand just does what it has always done.
Next time you fill up in Broughton in Furness: preventing petrol in a diesel
- Green for unleaded and black for diesel is normal in the UK — yet not on every forecourt. Go by the label on the petrol pump, not the colour.
- In a motor you do not know, look inside the flap over your filler or at the cap before the first fill: many motors print the fuel type there.
- Good intentions do less than a sticker or a fob in a vivid colour on your diesel's key when a household has one of each. So mark it.
- Before the nozzle leaves the petrol pump the first time you fuel a hired or new vehicle, say "diesel" aloud. Silly, yes, yet it does the trick.
- Mistakes like this are easy to make whilst your mind is on something else, so your phone goes away.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler designed to block a petrol nozzle, and add-on devices are available for the remainder. Treat it as a backstop, then keep reading the pump.
- Less petrol makes a thinner mix, so stop the moment you realise — while remembering that the next stage is unchanged. It is still not to start the car.
Put petrol in a diesel around Broughton in Furness already?
The order of things is short, then. Leave it unstarted, with your ignition off too. If you're still on the forecourt — CGP Pitstop or anywhere else — ask the attendants to help you push the car clear of the petrol pump. Call 0333 366 0103 next, with three answers — your fuel, the rough volume, and if it's run.
Corrosion and deposits are the problem with AdBlue, where petrol brings lost protection. So if it was AdBlue, say so — and read its own Broughton in Furness page.
One petrol in a diesel task around Broughton in Furness costs more than another. Why?
Four separate tasks sit behind the four scenarios above — which is why there's no honest single price. The situation itself does most of the work of moving your cost. The ratio matters next, meaning how much of that tank is petrol, followed by the position of the vehicle and whether getting to it is safe for a technician.
Three questions come first, before any quote, instead of after — what went in, how much, has it run — and this is the reason. A range turns into a straight figure when those replies are in.
About Broughton in Furness
Broughton in Furness is a small town situated on the coastal plain of the Duddon Estuary in Cumbria, with a population of around 924 people. Broughton in Furness has a mix of housing types, but detached homes are the most common, and the town is close to nearby places such as Eccle Riggs and Wreaks End. Broughton in Furness is located near the Duddon Bridge and is approximately 22.7 miles from Lancaster. Broughton in Furness sits at a low elevation of 17 metres above sea level, making it a coastal town with a unique character.
Fuel drain cover across Cumbria, Broughton in Furness included
Broughton in Furness waits in the LA postcode area, and the vans that answer petrol in diesel call-outs there work the places around it as well — Eccle Riggs, Wreaks End and Duddon Bridge among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all spots our engineers drain, and your vehicle doesn't need to come to us.
At the pump in Broughton in Furness, right now?
Then you are in the best spot there can be. Keep the vehicle turned off, and ring.