Baslow: Petrol in a Diesel Car? How Worried to Be
If it has not been started, you can worry far less than you probably are. Petrol sitting in a diesel tank does nothing to your motor until something pulls it through the fuel system — your ignition priming the pump, the starter, or driving on its own. So the truthful answer to the first query everyone around Baslow asks, "have I ruined it?", is usually no. Keep it that way: leave the engine off then phone Petrol in Diesel. What petrol really does to a diesel, how to gauge how far it's gone, and how to stop it from happening a second time: that's the rest of this page.
Your engine and petrol in a diesel: what happens
Two jobs fall to diesel on its journey through a motor. It lubricates first, and only then does it burn. What stops the surfaces inside your high-pressure pump and the fuel injectors from wearing against one another is the diesel flowing through them — they're made to very fine tolerances.
Badly at the first, not at all at the second: that is petrol. Being less viscous than diesel, petrol strips out the lubrication a fuel system needs, so a pump running on the mixture wearing itself. It's also made to resist igniting under compression — the opposite of what a diesel needs — which is where you hear the clattering.
Seen together, they make clear what shape the issue takes. Contact does not do the harm — circulation does. Any tank with petrol in it is a fuel issue. After your pump has been labouring on that petrol, a mechanical issue has started: anything shed by a pump that's grinding is carried onward to the injectors with the fuel.
How serious is petrol in a diesel? Four situations our technicians see around Baslow
Fuelled but never started — the best it gets. On a forecourt, and truly only there, that petrol is still limited to your tank — since everywhere else the vehicle was driven to get to it. The job is emptying and flushing on the spot.
The ignition turned on, or a short start. Once primed, the fuel system has pulled petrol out of that tank as far as the filter and the fuel lines. Still generally easy: drain, flush, and the filter seen to.
Driven a few miles. Now your pump has spent those miles labouring on weakened fuel. Tank, lines, filter, then clean fuel put through the entire system: that's this work, and the way your car was driven matters as much as the mileage. Driving the children to St Anne's CofE Primary School is one kind of trip. Driving as far as Sheffield, under 15 miles away, makes a very different task — as does any distance on the M1, under 15 miles from Baslow, with the engine running hard the whole time.
Driven until it complained. Knocking, a ragged idle, smoke, a throttle that has gone soft. The engine is telling you your fuel is no longer behaving like diesel. Whether it is the verge on Church Street, a lay-by or a side road, stop where you are and leave it. What comes first is still the fuel drain and flush, and that takes care of it, with long-term damage very rare when a car is pulled over soon.
Baslow motorists and the petrol in a diesel stories they hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Topping up takes out nothing; it gives you a bigger tank of the same mix. A diesel fuel system doesn't tolerate petrol by percentage in the way that advice presumes.
If anything, the opposite holds. Myth: "A current diesel can cope with a bit of petrol." Finer components and higher pressure are the way a modern diesel runs its fuel, and that makes the protection count more, not less.
Myth: "If it starts and drives, there is no harm done." This is the one that catches motorists. Feed diesel to a petrol motor and it generally will not run, so the driver stops — and the damage stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile the pump grinds. Being able to run is not the same as being fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a distinct issue. The petrol is still inside your tank afterwards, and whatever it has thinned is not put back.
"Drain it yourself and you're sorted" — a myth, since after it has been running some petrol lies in your filter and lines, waiting to go right back through your pump on your next start. On top of that, petrol drained into a can by the road is genuinely hazardous.
How does petrol in a diesel occur?
On purpose? Never. Through carelessness? Seldom, if ever. 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 vehicle at all. So the mistake runs one way.
When routine and the vehicle stop matching, it happens. Courtesy car, hire car, or a motor that is brand new. Two cars on one driveway, one petrol, one diesel. A forecourt you know, only with its pumps laid out differently. Racing for a train at Grindleford and filling up en route. Years of petrol vehicles behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that's when. Your hand repeats what it has always done once you add rain, a phone call or a back seat full of children.
Next time you fill up in Baslow: preventing petrol in a diesel
- The label is what counts, and so check the petrol pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on every forecourt.
- In a vehicle you do not know, look inside the flap over your filler or at the cap before the first fill: many vehicles print the fuel type there.
- Label your key. In a household with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of intending to remember.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the pump. It sounds silly and it does the trick.
- Whilst you are thinking about something else, this is an easy mistake to make — so tuck your phone away.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler designed to refuse a petrol nozzle, and aftermarket devices exist for the remainder. Count it as a backstop, then keep checking the petrol pump.
- Stop as soon as you notice. Less petrol inside the tank makes a thinner mixture. It doesn't change what to do next, which is still not to fire it up.
Petrol already in a diesel in Baslow? Begin here
Then the order of things is brief. Do not turn your ignition on, and do not fire it up. Yet on the forecourt, at BP 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 was put in, about how much, and if it has been run.
If it was AdBlue instead of petrol, say so. That's a different issue — corrosion and deposits instead of lost protection — and it has its own page for Baslow.
One petrol in a diesel job in Baslow costs more than another. Why?
There's no honest single quote for this, because the four scenarios above are four separate jobs. What moves the cost is mostly which of them you're in. Where the vehicle is matters too, and whether a van can safely reach it, after the ratio of petrol to what your tank holds.
Ahead of any quote, not after, we ask three queries: the fuel that was put in, the quantity, and whether it has run. That's why. The replies change a range into a straight figure.
About Baslow
Baslow is a village in Derbyshire, situated on the banks of the River Derwent at an elevation of around 120 metres. Baslow lies approximately 11 miles southwest of Sheffield and 136 miles northwest of London, with nearby areas including West End, Bridge End, and Over End. Baslow has a population of around 830 residents, predominantly living in detached housing. Baslow is characterized by its riverside setting and surrounding countryside.
Baslow and Derbyshire: where our fuel drain cover reaches
The teams answering petrol in diesel call-outs around Baslow, in the DE postcode area, equally work the locations around it, West End, Bridge End and Over End included. A forecourt, a supermarket car park, a lay-by or your own driveway are all spots our engineers drain, and the vehicle doesn't need to come to us.
Still at the petrol pump in Baslow?
Then, you could not be in a better place. Call, and keep it turned off.