How Worried Should You Be? Petrol in a Diesel Car in Bilsthorpe
Not started? Then less worried than you probably are. Till your ignition primes your pump, your starter turns, or the car is driven, petrol in a diesel tank simply waits there and does nothing. Which means the truthful reply to the first Bilsthorpe question — "have I ruined it?" — normally no. Leave your motor off and ring Petrol in Diesel — that is how you keep it that way. Below, you will find what petrol really does inside a diesel, how far it might have gone, and how to stop it happening to you a second time.
Inside the motor: what petrol in a diesel really does
Passing through a motor, diesel is doing two jobs at the same time. It lubricates to begin with, and after that does it burn. Extremely fine clearances are built into your injectors and the high-pressure fuel pump, and only your diesel flowing through stops those surfaces grinding together.
The second task petrol doesn't do at all, and the first it does poorly. It's runnier than diesel and takes away the protection your fuel 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 opposite of what a diesel needs from its fuel. That's where the knocking comes from.
Combined, those make the shape of the trouble plain. Contact doesn't do the damage — circulation does. Where that petrol is only in that tank, it's a fault of fuel, nothing more. The beginning of a mechanical problem is a pump that has been labouring on that petrol — and whatever a worn pump sheds moves on with your fuel to the fuel injectors beyond it.
Bilsthorpe, petrol in a diesel: four situations, from mild to major
The best case there is: filled up, never started. Just your tank has petrol in it, and so the task is draining your tank and rinsing your system where the vehicle stands. This situation can only really happen at a forecourt: anywhere else, the car got there by being driven.
Started for a moment, or only your ignition on. Once primed, the fuel system has pulled petrol out of your tank as far as the filter and the fuel lines. Usually nothing more than clearing, purging and sorting the filter, so still simple.
A couple of miles driven, and the pump has spent every one of them running on diluted fuel. The work is that tank, the fuel lines, your filter and clean fuel through the entire circuit, and how hard the car was driven matters as much as how far. Short trips, like the school run to Bilsthorpe Flying High Academy, are one matter. Very different a second time: a trip to Nottingham, under 15 miles away, or some mileage on the M1, under 15 miles from Bilsthorpe, where the motor never stopped working hard.
It complained, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone ragged. The fuel is not acting like diesel any more, and the motor is telling you. Stop wherever you are — the verge on Cul-De-Sac, a lay-by, a side street — then leave the car where it is. The fuel drain and flush-through still go first, and they sort it out: if a vehicle is pulled over quickly, lasting damage is very uncommon.
Stories Bilsthorpe 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 by topping up — you're left with a fuller tank, still the same mixture. Percentage is not how a diesel fuel system copes with petrol, however much that guidance assumes.
Not so: a current diesel copes with a bit of petrol. Rather, the opposite. Lubrication matters more on current diesels, not less, because their fuel runs through smaller components at higher pressure.
One myth that catches people off guard: if it starts and drives, it must be unharmed. Diesel in a petrol motor normally leaves a motor that will not run: the motorist stops, and so does the harm. Whilst your pump grinds, a diesel fed petrol usually starts, idles and drives away as though nothing has happened. Fine and running are not the same at all.
Myth: "Add some two-stroke oil and drive the vehicle home." It is an outdated fix for a different problem. None of what petrol thinned gets put back by it — and afterwards, your tank still holds that petrol.
Once the motor has been run, part of the petrol is in your filter and your lines, not that tank — and the next start pulls it right back through your pump. So the myth "drain that tank yourself and you're sorted" doesn't stand up. Emptying petrol into a can at the roadside is also really risky.
Petrol in a diesel: how does it take place?
It's rarely carelessness, and no one does it on purpose. The petrol nozzle is the smaller of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly will not go into a petrol vehicle at all. The forecourt makes it simple, and the error runs one way.
When routine and the vehicle stop matching, it occurs. Courtesy car, hire car, or a vehicle that is brand new. Households running one of each, petrol and diesel. Your normal forecourt, its pumps suddenly in a different order. Rushing for a train at Mansfield and filling up en route. Years of petrol vehicles behind you, a diesel Renault Megane in front of you at the forecourt for its first tank — that's when. Add a back seat full of kids, a phone call or rain, and habit takes over.
Avoiding petrol in a diesel next time you fill up around Bilsthorpe
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most generally do. Check the petrol pump's label; the colour is just a hint.
- In a car you do not know, look inside the flap over the filler or at the cap before the first fill: plenty of cars print the fuel type there.
- Good intentions count for less than a sticker or a fob in a bright colour on your diesel's key when a household has one of each. So label it.
- It seems daft and it works: on the first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump.
- Put the phone away. This is an easy mistake to make while you are thinking about something else.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler designed to refuse a petrol nozzle, and add-on devices exist for cars without one. They are a backstop, not a reason to stop checking the pump.
- Stop the moment you notice. Less petrol inside your tank means a thinner mix. It doesn't change what to do next, which is still not to crank it.
Petrol already in a diesel around Bilsthorpe? Start here
The order of things is short, then. Don't turn the ignition on, and do not fire it up. Ask the staff to help you push it clear of the pump if you're still at the forecourt, whether that is Brookside Garage or anywhere else. What got in, about how much, and whether it has run: tell us those when you phone 0333 366 0103.
If it was AdBlue and not petrol, say so. That's a separate fault — corrosion and deposits and not lost protection — and it has its own page for Bilsthorpe.
Bilsthorpe petrol in a diesel tasks: why one costs more than another
The four scenarios above are four separate tasks, so no single price for this would be honest. What moves your cost is mostly which of them you are in. Two things follow that: the petrol that went in as a share of what that tank takes, then the spot your car is in and whether a van can get to it safely.
Three questions come first, before any quote, rather than after — what went in, how much, has it run — and that is the reason. Their replies are what change a range into one firm number.
About Bilsthorpe and where it is
Bilsthorpe is a village in Nottinghamshire, situated on the banks of a river at an elevation of 77 metres. Bilsthorpe lies approximately 13.6 miles north of Nottingham and 119.2 miles north of London, with nearby areas including Bilsthorpe Moor and Belle Eau Park. Bilsthorpe has a population of around 2111 people, predominantly living in semi-detached housing.
Across Nottinghamshire and in Bilsthorpe: fuel drain cover
Petrol in diesel call-outs in Bilsthorpe — part of the NG postcode area — go to teams that likewise cover the locations round it, Bilsthorpe Moor, Belle Eau Park and Eakring among them. The car doesn't need to come to us: our technicians drain on a forecourt, in a supermarket car park, in a lay-by or on your own drive.
In Bilsthorpe and still at the petrol pump?
Nothing beats it: that's where you are. Leave the car turned off, and ring.