Petrol in a Diesel Car in Birchen Coppice: How Worried Should You Be?
Less than you likely are, provided it hasn't been started. Everyone around Birchen Coppice starts with "have I wrecked it?", and the honest answer is usually no: petrol resting in your tank of any diesel stays harmless till priming, cranking or driving pulls it into your fuel system. To keep the car like that, phone Petrol in Diesel then leave your engine switched off. What petrol really does to a diesel, how to gauge how far it's gone, and how to keep it from happening again: that is the remainder of this page.
What petrol in a diesel does to the motor
Diesel does two tasks on its way through a motor. It lubricates first, and after that does it burn. The high-pressure fuel pump and the fuel injectors are built to very fine tolerances, and the diesel passing through them is what keeps those surfaces from grinding against each other.
Badly at the first, not at all at the second: that's petrol. A pump working on a petrol mixture is wearing itself out, because petrol is runnier than diesel and strips out the protection the fuel system relies on. Petrol is also designed to resist igniting under compression — the opposite of what a diesel wants from its fuel — and that is where any clattering comes.
Combined, those leave the shape of the trouble clear. Contact doesn't do the harm — movement does. A tank with petrol in it is a fuel fault. A pump that has been running on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to the fuel injectors further on.
How serious is petrol in a diesel? Four situations our engineers see in Birchen Coppice
Filled up, and never started: nothing beats it. The petrol is inside that tank and only the tank, and the job is a drain and a flush where the vehicle sits. This is the one situation that can only really occur on a forecourt, since anywhere else the vehicle has been driven to get there.
Ignition on, or started for a moment. With the system primed, your lines and filter already hold petrol that has come from the tank. That's generally still an easy job — a drain, a flush, and your filter seen to.
Your pump has worked a couple of miles on weakened fuel — that is what driving it does. Tank, lines, filter, then fresh fuel put through the whole circuit: that's this work, and the way the car was driven counts as much as the distance. Driving the children to Birchen Coppice Academy is one kind of trip. Any mileage on the M5, under 10 miles from Birchen Coppice, means your engine has worked hard throughout, and a run to Worcester, under 15 miles away, is a very different job too.
Clattering, an uneven idle, smoke, a throttle gone soft: driven until it complained. The fuel isn't behaving like diesel any more, and your motor is saying so. Pull up wherever you are — the verge on Whittall Drive East, a lay-by, a side street — and leave the vehicle where it is. What goes first is still the fuel drain and flush-through, and that deals with it, with long-term damage very rare when a vehicle is pulled over quickly.
Stories Birchen Coppice people hear about petrol in a diesel
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. Nothing is removed when you top up — the tank simply carries more of the same blend. The idea behind the guidance — that diesel fuel systems tolerate petrol by percentage — is wrong.
"Current diesels can handle a little petrol" — a myth, and nearer the reverse. A newer diesel runs its fuel through smaller components at higher pressure, which makes the lubrication matter more, not less.
Myth: "If it starts and drives, there's no harm done." This is the one that catches motorists. The motorist of a petrol motor fed diesel usually has no choice but to stop, since it will not run, and the damage stops with them. Whilst the pump grinds, a diesel fed petrol normally starts, ticks over and drives away as though nothing has happened. Being able to run isn't proof of being fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a separate issue. It doesn't put back what petrol has thinned, and the petrol is still inside that tank afterwards.
The next start sends petrol back round your pump out of your lines and the filter, where some of it sits once the engine has run. That is why a DIY tank drain doesn't leave you sorted — a myth. It is also truly dangerous to drain petrol into a can at the roadside.
Why petrol in a diesel takes place at all
Carelessness is seldom the cause, and no one means to do it. The forecourt makes it easy: the petrol nozzle is the narrower of the two, and it slips into a diesel filler with almost no resistance, while a diesel nozzle generally won't go into a petrol motor at all. So the slip runs one way.
When routine and your car stop matching, it occurs. Courtesy car, hire car, or a car that is new. A household with one petrol and one diesel on the driveway. The pumps in a different order on a familiar forecourt. Fuelling up in a hurry on the way to Kidderminster, with a train to catch. Years of petrol motors behind you, a diesel Volkswagen Golf in front of you at the forecourt for its first tank — that's when. Add rain, a phone call or a back seat full of children, and your hand does what it has always done.
Next time you fill up in Birchen Coppice: preventing petrol in a diesel
- Check the petrol pump, not the colour. In the UK unleaded handles are generally green and diesel black, but not on every forecourt. The label is what counts.
- In a car you don't know, look inside the flap over the filler or at the cap before the first fill: plenty of cars print the fuel type there.
- One of each in the house? Mark the key to the diesel — a coloured fob, a sticker — since intending to remember is not enough.
- "Diesel", aloud, before you pick up the nozzle — each time a new or hired car needs its first tank. It seems silly. It does the trick.
- Mistakes like this are simple to make while your mind is on something else, and so the phone goes away.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler built to refuse a petrol nozzle, and add-on devices are available for the remainder. Treat it as a backstop, then keep checking the petrol pump.
- The moment you notice, stop: less petrol inside that tank makes a thinner mixture. What to do next does not change, though — still don't start the car.
Already put petrol in a diesel around Birchen Coppice?
Then the order of things is short. Don't crank it, and don't switch the ignition on. If you're still at the forecourt — Shell or anywhere else — ask the attendants to help you roll the car clear of the pump. Next, 0333 366 0103. We'll ask what got in, roughly how much, and if it's been run.
Corrosion and deposits form the trouble with AdBlue, where petrol means lost lubrication. So if it was AdBlue, say so — and see its own Birchen Coppice page.
Birchen Coppice petrol in a diesel tasks: why one costs more than another
Four different jobs lie behind the four situations above — which is why there's no honest single quote. What shifts the cost is chiefly which of them you're in. Two things follow that: the petrol that was put in as a proportion of what your tank holds, then the place your car is in and whether a van can reach it safely.
That is why our technicians ask three queries before costing rather than after: what went in, how much, and if it's run. The answers turn a range into a straight figure.
About Birchen Coppice itself
Birchen Coppice is a suburban area in Worcestershire, situated approximately 12 miles north of Worcester and 109 miles west of London. Birchen Coppice lies at an elevation of around 70 metres, in a gently sloping landscape near Sutton Farm and Foley Park. Birchen Coppice is characterized by its predominantly semi-detached housing stock, with nearby Summerhill also forming part of the local residential area.
Across Worcestershire and around Birchen Coppice: fuel drain cover
Our teams answering petrol in diesel call-outs around Birchen Coppice, in the DY postcode area, equally work the places near it, Sutton Farm, Foley Park and Summerhill included. A forecourt, a supermarket car park, a lay-by or your own drive are all places our engineers work, and your vehicle does not need to move to us.
In Birchen Coppice and still at the pump?
The best position there is, then — that is where you are. Ring, and keep it switched off.