Should You Worry? Petrol in a Diesel Car in Greenbottom
Unstarted? Then less worried than you probably feel. Until the ignition primes the pump, the starter turns, or the car is driven, petrol in a diesel tank simply rests there and does nothing. Which means the truthful reply to the first Greenbottom query — "have I wrecked it?" — usually no. Keep it that way: leave your motor off and ring Petrol in Diesel. Below, this page sets out what petrol actually does inside a diesel, how far it may have got, and how to stop it happening to you again.
The engine and petrol in a diesel: what goes on
Passing through a motor, diesel does two jobs at the same time. Before it ignites, it lubricates — then it ignites. Designed to extremely fine gaps, the injectors and your pump depend on the diesel flowing through them to keep their surfaces from wearing against one another.
Of these two jobs, petrol manages the first poorly and the second never. The clattering comes from petrol being made not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips away the protection the system hinges on, and any pump running on such a blend is wearing itself.
Combined, those leave the shape of the problem plain. Contact does not do the damage — movement does. Any tank with petrol in it is a fuel fault. Whatever a worn pump sheds goes on, carried by your fuel, into your injectors further along, which is why a pump that has been working on that petrol is where a mechanical issue begins.
Four scenarios we see around Greenbottom: how serious is petrol in a diesel?
The best case there can be: filled up, never started. Only that tank has petrol in it, so the job is emptying the tank and purging the fuel system where your car sits. This scenario can only truly occur at a forecourt: anywhere else, the vehicle got there by being driven.
Ignition on, or started for a moment. The system has been primed, so petrol has left that tank and got to the filter and the lines. Still generally simple: drain, flush, and the filter dealt with.
Those few miles on the road were your pump working on fuel weakened by petrol the whole way. Tank, lines, filter, then fresh fuel run through the whole circuit: that's the work, and the way your car was driven counts as much as the distance. A school run to St. Oswald's CofE Primary School is one thing. A run as far as Bradford, under 10 miles away, is a very different job. So is any mileage on the M606, under 10 miles from Greenbottom, where your engine has been working hard throughout.
It protested, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone lumpy. What you are hearing is the engine reporting fuel that no longer runs like diesel. Whether it's the verge on The Green, a lay-by or a side street, stop where you are and leave it. Long-term damage is very unusual if a vehicle is pulled over soon, and the drain and flush that still go first sort it out.
Petrol in a diesel stories Greenbottom motorists hear
"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 — that tank simply carries more of the same blend. The idea behind the advice — that diesel fuel systems accept petrol by percentage — is wrong.
If anything, the opposite holds. Myth: "A current diesel can cope with a bit of petrol." Smaller components and higher pressure are how a newer diesel runs its fuel, and that makes the lubrication matter more, not less.
"It starts, it drives, so there is no harm" — the myth that catches more drivers than any other. Feed diesel to a petrol motor and it normally will not run, so the driver stops — and the harm stops with them. Feed petrol to a diesel and it generally fires up, idles and drives away like nothing has happened — all the while its pump wears. Running does not mean fine.
An outdated workaround for a separate fault is behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." What petrol has thinned stays diluted, and that petrol stays inside the tank anyway.
Once the motor has been run, part of that petrol sits in your filter and the fuel lines, not that tank — and the next start sends it right back through the pump. So the myth "drain your tank yourself and you're sorted" does not hold. On top of that, petrol drained into a can by the road is genuinely dangerous.
Why petrol in a diesel occurs so easily
Nobody does it on purpose, and it is seldom carelessness. One way only, since of the nozzles: the smaller petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one mostly will not fit a petrol car. That's how the forecourt makes it easy.
It happens when routine and your car stop matching. A new motor, a hire car or a courtesy car. One petrol and one diesel on the driveway of the same household. A forecourt you know, only with its pumps arranged differently. A train to catch, and a hurried fill on the way to Guiseley. Exactly the moment it happens: after years of driving petrol, a driver fills a diesel Renault Megane for the first time. Throw in 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 around Greenbottom: avoiding petrol in a diesel
- A green handle for unleaded and black for diesel is normal in the UK — yet not on each forecourt. Go by the label on the petrol pump, not the colour.
- Check the filler flap. Plenty of vehicles state the fuel inside the flap or on the cap. Look at it on your first fill in a vehicle you do not know.
- One of each in the household? Label the key to your diesel — a coloured fob, a sticker — since intending to remember is not enough.
- "Diesel", out loud, before you lift the nozzle — every time a new or hired car needs its first tank. It seems daft. It works.
- Thinking about something else is when this becomes an easy mistake to make, so tuck the phone away then keep your mind on the petrol pump.
- Some diesels come with a filler designed to block a petrol nozzle, and devices you can add are available for motors without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the pump.
- Stop the moment you notice. Less petrol inside that tank means a weaker blend. It doesn't change what to do next, which is still not to fire it up.
Greenbottom: already put petrol in a diesel?
In that case, there is just a short order of things. Don't fire it up, and don't turn the ignition on. If you are still at the forecourt — Morrisons or anywhere else — ask the attendants to help you roll the car clear of the pump. Call 0333 366 0103 next, with three facts — the fuel, the approximate quantity, and if it's run.
Corrosion and deposits form the problem with AdBlue, whereas petrol brings lost protection. So if it was AdBlue, say so — and read its own Greenbottom page.
Greenbottom petrol in a diesel tasks: why one costs more than another
There's no fair single price for this, since the four scenarios above are four different tasks. What moves the cost is mostly which of them you're in. Where the car is matters too, and whether our van can safely reach it, after the ratio of petrol to what your tank takes.
Before any quote, not after, we ask three queries: the fuel that went in, the quantity, and whether it's run. That is why. Their answers are what turn a range into one firm number.
About Greenbottom itself
Greenbottom is a suburban area located on the riverside in West Yorkshire, with an elevation of 133 metres. Greenbottom sits near the city of Bradford, approximately 5.9 miles away, and is close to nearby places such as Guiseley and Shaw Lane. Greenbottom has a population of around 5995 people and predominantly features semi-detached housing. Greenbottom is situated in a region that is about 176.2 miles from London.
Across West Yorkshire and in Greenbottom: fuel drain cover
Petrol in diesel calls in Greenbottom — part of the LS postcode area — go to teams that likewise cover the locations round it, Guiseley, New Scarborough and Shaw Lane among them. Our technicians drain wherever the vehicle is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
Still at the petrol pump around Greenbottom?
In that case, you couldn't be in a better spot. Keep the car turned off, then ring.