Should You Worry? Petrol in a Diesel Car in Longton
Provided it has not been started, worry less than you probably are. Until your ignition primes your pump, your starter cranks, or your car is driven, petrol in a diesel tank just sits there and does no harm. Which makes the honest reply to the first Longton query — "have I wrecked it?" — usually no. Petrol in Diesel is who to ring, with the engine left off, so it remains that way. Keep reading for three things: the effect petrol has inside a diesel motor, the clues of how far it has spread, and ways to make sure you never repeat it.
Inside the motor: what petrol in a diesel really does
Two jobs fall to diesel on its journey round a motor. It protects to begin with, and after that does it burn. What keeps the surfaces inside the high-pressure pump and the injectors from grinding against each other is the diesel flowing through them — they are designed to very fine tolerances.
Of those two tasks, petrol handles the first poorly and the second not at all. The clattering comes from petrol being designed not to ignite when compressed, which is precisely the opposite of what a diesel needs. On top of that it is runnier than diesel, it strips out the lubrication your system hinges on, and any pump working on that mix is wearing itself.
The shape of the trouble is plain once you put those together. Contact does not do the damage — circulation does. Any tank with petrol in it is a fuel fault. The beginning of a mechanical problem 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 situations we see in Longton
Filled up, and not started: nothing beats it. At a forecourt, and truly only there, that petrol is still confined to that tank — because anywhere else your car was driven to get to it. The task is emptying and purging on the spot.
Ignition on, or started for a second. With the system primed, the fuel lines and filter now hold petrol that came from your tank. Drain, flush, deal with your filter: still usually easy.
Those few miles on the road meant the pump labouring on fuel diluted by petrol the whole way. Tank, lines, filter, then clean fuel put through the entire circuit: that's the work, and the way your car was driven counts as much as the mileage. Driving the kids to Longton Primary School is one kind of trip. Any distance on the M65, under 5 miles from Longton, means the engine has worked hard throughout, and a run to Preston, under 5 miles away, is a very different task as well.
Driven on until it protested — rattling, smoke, a ragged idle, a dead throttle. The fuel is not acting like diesel any more, and your engine is saying so. Pull up where you are — on the verge on Liverpool Road, at the kerb, down a side road — and do not move it again. Lasting damage is very rare when a car is stopped soon, and the fuel drain and flush that still go first deal with it.
Stories Longton people hear about petrol in a diesel
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing is removed when you top up — the tank simply holds more of the same mixture. Percentage is not how a diesel fuel system tolerates petrol, whatever that advice supposes.
Not so: a current diesel copes with a bit of petrol. Rather, the reverse. At higher pressure, through smaller parts: that's how a current diesel handles its fuel, and so the lubrication counts more, not less.
One myth that catches motorists out: if it starts and drives, it must be unharmed. Feed diesel to a petrol motor and it usually will not run, so the motorist stops — and the harm stops with them. A diesel fed petrol normally starts, idles and drives away as if nothing has happened, while your pump wears. Running doesn't mean fine.
An old workaround for a different problem is behind this one. Myth: "Add some two-stroke oil and drive it home." What petrol has diluted remains thinned, and the petrol stays inside the tank regardless.
The next start sends petrol back round the pump out of the fuel lines and your filter, where some of that sits once your engine has run. That's why draining the tank yourself doesn't sort it — a myth. Emptying petrol into a can at the kerbside is also really risky.
Petrol in a diesel: how does it take place?
On purpose? Never. Through carelessness? Rarely, if ever. A diesel nozzle mostly won't go into a petrol vehicle, but the smaller petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one mistake straightforward, and just in that direction.
When habit and the car stop matching, it takes place. Hire cars, courtesy cars, and motors that are new to you. Two vehicles on one driveway, one petrol, one diesel. A forecourt you know, but with its pumps arranged differently. A train to catch, and a hurried fill en route to Preston. The first fill-up in a diesel Renault Megane after years of driving petrol is precisely the moment it occurs. With rain, a call arriving, or a car full of children to deal with, the hand simply does what it has always done.
Avoiding petrol in a diesel next time you fill up in Longton
- Not every forecourt in the UK follows green for unleaded and black for diesel, even if most generally do. Read the pump's label; the colour is just a clue.
- The first fill in a strange motor is the time to check the filler flap — inside it, or on the cap, many motors state which fuel to use.
- A coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember, for a household with one of each.
- Before the nozzle comes off the pump the first time you fill a hired or new vehicle, say "diesel" out loud. Daft, yes, but it does the trick.
- Mistakes like this are easy to make while your mind is on something else, so the phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to block a petrol nozzle, and add-on devices exist for cars without one. They are a backstop, not a reason to stop reading the pump.
- Less petrol means a weaker mixture, so stop the moment you notice — though remembering that your next stage is unchanged. It is still not to crank it.
Already put petrol in a diesel in Longton?
Then the order of things is short. Don't turn the ignition on, and do not fire it up. If you are still at the forecourt — Suthers Star Garage or anywhere else — ask the staff to help you roll it away from the pump. Then ring 0333 366 0103 and tell us what was put in, about how much, and if it has run.
Say so if it was AdBlue rather than petrol: it is a separate issue, with its own page for Longton, since AdBlue brings corrosion and deposits rather than lost protection.
What makes one Longton petrol in a diesel task cost more than the next
Four separate tasks sit behind the four situations above — which is why there is no fair single quote. Which of them you're in is mostly what moves the cost. The share counts next, meaning how much of your tank is petrol, and then the location of the car and whether getting to it is safe for a van.
Ahead of any quote, not after, come three queries: your fuel that was put in, its volume, and whether it has run. That's why. A range turns into a straight figure once the replies are in.
About Longton
Longton is a village in Lancashire, situated on the riverside at a low elevation of around 20 metres. Longton lies close to the city of Preston, approximately 4 miles to the south, and is surrounded by other small communities such as Hutton and Walmer Bridge. Longton has a population of around 1783 people, predominantly living in semi-detached housing. Longton is located in the North West region of England, about 189 miles north of London.
Across Lancashire and in Longton: fuel drain cover
Hutton, Walmer Bridge and Bottom of Hutton are among the spots near Longton that the same teams work, answering petrol in diesel call-outs across Longton's PR postcode area. No need to bring your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations we drain.
At the pump around Longton, still?
The best place there is, then — that is where you are. Switched off it remains; then phone.