Should You Worry? Petrol in a Diesel Car in Bracken Bank
Unstarted? Then less worried than you probably feel. Petrol sitting in a diesel tank does nothing to your engine until something pulls it through the system — the ignition priming your pump, the starter, or the drive on its own. So the truthful answer to the first query anyone around Bracken Bank asks, "have I wrecked it?", is generally no. Keep it like that: leave your engine off then phone Petrol in Diesel. What petrol actually does to a diesel, how to judge how far it's travelled, and how to keep it from happening again: that's the remainder of this page.
Petrol in a diesel: what does it do to the motor?
Diesel does two jobs on its way through a motor. It burns, and before it ignites it lubricates. What keeps the surfaces inside your high-pressure pump and your injectors from wearing down against one another is your diesel passing through them — they're made to extremely fine tolerances.
The second task petrol does not do at all, and the first it does poorly. The knocking comes from petrol being designed not to ignite when compressed, which is exactly the opposite of what a diesel needs. On top of that it is runnier than diesel, it strips out the lubrication your system depends on, and any pump running on that blend is wearing itself.
The shape of the problem is clear once you put those together. Not contact but movement is what does the damage. All a tank with petrol in it amounts to is a fuel problem. Whatever a worn pump sheds travels on, borne by the fuel, into the fuel injectors downstream, which is why a pump that has worked on the petrol is where a mechanical issue begins.
Bracken Bank, petrol in a diesel: four situations, from mild to significant
Filled up, not once started. The best case there can be. At a forecourt, and genuinely only there, the petrol is still limited to that tank — because anywhere else the car was driven to reach it. The task is emptying and cleaning on the spot.
Ignition on, or started for a moment. With your system primed, the lines and filter already hold petrol that came from your tank. Drain, flush, see to the filter: still usually straightforward.
Those few miles driven were the pump running on fuel diluted by petrol throughout. How hard the vehicle was driven counts as much as how far, and this work covers your tank, the fuel lines, the fuel filter and fresh fuel through the whole circuit. Driving the children to Worth Valley Primary School is one kind of trip. Very different again: a trip to Bradford, under 10 miles away, or some distance on the M606, under 10 miles from Bracken Bank, where your engine kept running hard.
Rattling, a lumpy idle, smoke, a throttle gone soft: driven till it complained. That is the engine telling you its fuel no longer is acting like diesel. Pull up where you are — on the verge on Central Drive, at the kerb, down a side road — and do not move it again. What goes first is still the drain and flush, and that sorts it out, with permanent damage very unusual when a car is pulled over quickly.
Myths Bracken Bank people hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Nothing is removed by topping up — you are left with a fuller tank, still the same mixture. That guidance assumes a diesel fuel system handles petrol by percentage. It doesn't.
Not so: a modern diesel copes with a bit of petrol. Rather, the opposite. A modern diesel sends its fuel through finer parts at higher pressure, which makes the lubrication matter more, not less.
"It starts, it drives, so no harm done" — the myth that trips up most drivers than any other. Diesel in a petrol motor normally means a motor that won't run: the driver stops, and so does the damage. Feed petrol to a diesel and it usually starts, ticks over and pulls away like nothing happened — all the while its pump is wearing. Running isn't the same as fine.
Myth: "Add some two-stroke oil and drive it home." It's an old fix for a distinct issue. None of what petrol weakened gets put back by it — and afterwards, that tank still contains that petrol.
"Drain it yourself and you are sorted" — a myth, since after it's been running some petrol lies in the fuel filter and lines, waiting to go right back through your pump at your next start. It is also really dangerous to drain petrol into a can by the kerbside.
Petrol in a diesel: how does it occur?
Nobody does it on purpose, and it's rarely carelessness. A diesel nozzle mostly will not fit a petrol vehicle, yet the narrower petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one error straightforward, and just in that direction.
It occurs when routine and the car stop matching. Hire cars, courtesy cars, and cars that are new to you. Households running one of each, petrol and diesel. The pumps in a different order on a well-known forecourt. Filling up in a hurry on the way to Keighley, with a train to catch. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is precisely the moment it happens. With rain, a call arriving, or a car full of children to deal with, the hand just does what it has always done.
How to avoid petrol in a diesel on your next fill-up around Bracken Bank
- The label is what matters, so read the petrol pump instead of the colour: in the UK unleaded handles are usually green and diesel black, yet not on every forecourt.
- The first fill in a strange vehicle is the time to check the filler flap — on it, or on the cap, many cars state which fuel they take.
- A coloured fob or a sticker on your diesel's key achieves more than any amount of intending to remember, for a household with one of each.
- It sounds daft and it does the trick: on your first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the petrol pump.
- Mistakes like this are simple to make while your mind is on something else, and so the phone goes away.
- Add-on devices are available for cars without one, and some diesels come with a filler that won't take a petrol nozzle. Useful — but a backstop only, never a reason to stop checking the label.
- Noticing it mid-fill? Stop at once. A thinner blend follows from less petrol inside the tank, yet the next step stays the same: don't fire it up.
Put petrol in a diesel around Bracken Bank already?
Then the order of things is brief. Leave it unstarted, with the ignition switched off too. If you're still at the forecourt — Shell or anywhere else — ask the attendants to help you push the car clear of the petrol pump. Next, 0333 366 0103. We will ask what got in, about how much, and if it has been run.
If it was AdBlue rather than petrol, say so. That is a separate problem — corrosion and deposits instead of lost protection — and it has its own page for Bracken Bank.
One petrol in a diesel task in Bracken Bank costs more than another. Why?
The four scenarios above are four separate jobs, so no single price for this would be fair. What moves your cost is chiefly which of them you are in. Two things come after that: the petrol that was put in as a share of what the tank takes, then the place the vehicle is in and whether a technician can reach it safely.
What went in, how much, and if it's run — three questions our engineers ask before quoting, not after, for precisely that reason. With those answers, you get a straight figure rather than a range.
About Bracken Bank and where it is
Bracken Bank is a suburban area situated on the riverside in West Yorkshire, with a mix of semi-detached housing and a population of around 4801 residents. Bracken Bank sits at an elevation of 165 metres, approximately 8.2 miles from Bradford, and is near other local places such as Damems, Bogthorn, and Hermit Hole. Bracken Bank is located within the wider Yorkshire and the Humber region, about 178.5 miles from London.
Bracken Bank and West Yorkshire: where our fuel drain cover runs
Petrol in diesel calls around Bracken Bank — part of the BD postcode area — go to vans that likewise cover the spots round it, Damems, Bogthorn and Hermit Hole among them. Our engineers drain wherever your vehicle is — your own drive, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
Still at the pump in Bracken Bank?
Then you are in the best place there is. Turned off it stays; then ring.