Petrol in a Diesel Car in Burley: How Worried Should You Be?
Likely less than you already are — as long as nobody has started the vehicle. "Have I ruined it?" is the first thing everyone around Burley asks, and the truthful answer is normally no, since petrol resting in a diesel tank hurts nothing until it's dragged through the fuel system — by ignition priming, by your starter, or by being driven. Leave your motor off and phone Petrol in Diesel — that keeps it like that. Keep reading for three things: the effect petrol has inside a diesel motor, the signs of how far it has got, and ways to make sure you never repeat it.
Petrol in a diesel: what does it do to the engine?
Diesel does two tasks on its way through a motor. Lubricating comes before burning; it does both. Extremely fine tolerances are built into your injectors and your high-pressure pump, and just your diesel flowing through stops their surfaces grinding together.
Poorly at the first, not at all at the second: that is petrol. It's thinner than diesel and removes the lubrication the fuel system depends on, so a pump running on a petrol mixture 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 is where the clattering comes from.
Together, those make the shape of the problem clear. Contact does not do the harm — circulation does. Any tank with petrol in it is a fuel problem. A pump that has been working on that petrol is the start of a mechanical one, and whatever a worn pump sheds travels on with your fuel to your injectors further on.
How serious is petrol in a diesel? Four situations our technicians see in Burley
Filled up, and never started: nothing beats it. Just your tank has petrol in it, and so the job is draining that tank and flushing the fuel system where the car sits. This situation can only truly happen at a forecourt: anywhere else, your car got there by being driven.
Ignition on, or started for a moment. The fuel system has been primed, so petrol has left the tank and got to the filter and your lines. Still usually simple: drain, flush, and your filter seen to.
Those few miles on the road meant your pump working on fuel diluted by petrol throughout. Miles is only half of that; how hard it was driven matters just as much. Either way this work includes your tank, the lines, your filter and clean fuel through the whole system. Driving the children to Burley St Matthias Church of England Voluntary Controlled Primary School is one kind of trip. Driving as far as Leeds, under 3 miles away, makes a very different job — as does any miles on the A58(M), under 3 miles from Burley, with your engine labouring hard all the way.
Driven on till it protested — knocking, smoke, an uneven idle, a soft throttle. The engine is telling you your fuel is no longer acting like diesel. Stop wherever you are — the verge on St Matthias Street, a lay-by, a side street — and leave it where it is. The fuel drain and flush-through still come first, and they deal with it: if a vehicle is stopped quickly, lasting damage is very unusual.
Petrol in a diesel stories Burley drivers hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. Nothing is removed when you top up — that tank just holds more of the same mixture. A diesel fuel system doesn't accept petrol by percentage in the way that guidance presumes.
If anything, the reverse holds. Myth: "A current diesel can cope with a bit of petrol." At higher pressure, through finer parts: that is how a current diesel handles its fuel, and so the lubrication matters more, not less.
The myth that catches people out: if it starts and drives, it must be unharmed. A petrol motor fed diesel generally won't run, so the driver stops and the damage stops with them. While your pump grinds, a diesel fed petrol normally starts, idles and drives away as though nothing has happened. Fine and running aren't the same thing.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a separate problem. None of what petrol weakened gets put back by it — and afterwards, that tank still contains the petrol.
Once the engine has been run, part of the petrol sits in your filter and your lines, not the tank — and your next start pulls it right back through the pump. So the myth "drain that tank yourself and you are sorted" doesn't stand up. Emptying petrol into a can at the kerbside is also truly dangerous.
How it happens: petrol in a diesel
No one does it on purpose, and it's rarely carelessness. One way only, because of the nozzles: the smaller petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one mostly won't fit a petrol vehicle. That's how the forecourt makes it easy.
It takes place when habit and the car stop matching. A new vehicle, a hire car or a courtesy car. One petrol and one diesel on the drive of the same household. The pumps in a different order on a well-known forecourt. Filling up in a hurry on the way to Burley Park, with a train to catch. A new-to-you diesel Volkswagen Golf, its first fuelling, and a motorist accustomed to petrol: precisely when it happens. Add a back seat full of kids, a phone call or rain, and the hand wins.
Preventing petrol in a diesel next time you fill up in Burley
- The label is what counts, so check the petrol pump rather than the colour: in the UK unleaded handles are normally green and diesel black, but not on each forecourt.
- Inspect your filler flap. Plenty of motors state the fuel type inside the flap or on the cap. Look at it on the first fill in any motor you do not know.
- A coloured fob or a sticker on the diesel's key achieves more than any amount of intending to remember, in a house with one of each.
- It sounds daft and it does the trick: on your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the pump.
- Put the phone away. This is an easy mistake to make while you are thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to block a petrol nozzle, and aftermarket devices are available for the rest. Treat it as a safety net, and keep checking the pump.
- The moment you realise, stop: less petrol in your tank makes a weaker blend. What to do next doesn't change, though — still do not start it.
Petrol already in a diesel in Burley? Start here
Short and simple, then, is the order of things. Leave it unstarted, with the ignition switched off too. Ask the attendants to help you roll it clear of the pump if you are still at the forecourt, whether that's BP or anywhere else. Ring 0333 366 0103 next, with three answers — the fuel, the approximate volume, and whether it has run.
If it was AdBlue and not petrol, say so. That is a separate fault — corrosion and deposits instead of lost lubrication — and it has its own page for Burley.
What makes one Burley petrol in a diesel job cost more than the next
There's no fair single price for this, because the four situations above are four different tasks. What moves your cost is mostly which of them you're in. Where the car is counts too, and whether our van can safely get to it, after the proportion of petrol to what your tank holds.
That is why we ask three queries before costing rather than after: what was put in, how much, and whether it's run. Their replies are what change a range into one firm number.
About Burley itself
Burley is a suburban area in West Yorkshire, situated on the riverside near Leeds, with a mix of terraced housing and local amenities. Burley sits at an elevation of around 50 metres, close to the city centre and nearby areas like Armley and Headingley. Burley is part of the larger Leeds urban area, with good transport links to the rest of the country, including London, which is approximately 170 miles away. Burley has a population of around 11,791 people, living in a variety of predominantly terraced homes.
Fuel drain cover across West Yorkshire, Burley included
Petrol in diesel calls around Burley — part of the LS postcode area — go to vans that also cover the spots round it, Armley, Headingley and Hyde Park among them. A forecourt, a supermarket car park, a lay-by or your own drive are all locations we work, and your car doesn't need to come to us.
Still at the petrol pump in Burley?
In that case, you couldn't be in a better spot. Call, and leave it turned off.