How Worried Should You Be? Petrol in a Diesel Car in Butterwick
Probably less than you are now — as long as no one has started the car. Petrol resting in a diesel tank does nothing to your engine till something pulls it through your fuel system — your ignition priming the pump, your starter, or the drive on its own. So the truthful answer to the first question everyone around Butterwick asks, "have I ruined it?", is normally no. Petrol in Diesel is who to ring, with the engine kept off, so it remains that way. The remainder of this page covers what petrol really does to a diesel, how to judge how far it has got, and how to make sure it does not happen to you a second time.
Inside the motor: what petrol in a diesel does
Passing through a motor, diesel is doing two things at once. It lubricates to begin with, and after that does it burn. What keeps the surfaces inside your high-pressure pump and the fuel injectors from grinding against each other is your diesel flowing through them — they are built to extremely fine clearances.
Of those two jobs, petrol manages the first badly and the second not at all. Being less viscous than diesel, petrol strips out the protection a fuel system needs, leaving a pump on the blend wearing itself. It is also made to resist igniting under compression — the opposite of what a diesel needs — which is where you hear the clattering.
Together, those leave the shape of the issue clear. The harm is done by movement, not by contact. All a tank with petrol in it amounts to is a fuel issue. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to your injectors further on.
How serious is petrol in a diesel? Four situations our technicians see in Butterwick
The best case there can be: filled up, not once started. Being at a forecourt is what makes this the case: elsewhere, the car has been driven there to begin with. With that petrol held in that tank alone, it's emptied and purged on the spot, and nothing more is needed.
Started for a moment, or only the ignition on. The fuel system has been bled, so petrol has left the tank and reached your filter and your lines. Drain, flush, see to your filter: still normally simple.
A few miles driven, and the pump has spent each of them running on thinned fuel. The work is the tank, the fuel lines, your filter and fresh fuel through the whole circuit, and how hard your car was driven matters as much as how far. On the school run to The Butterwick Pinchbeck's Endowed CofE Primary School, the distance is short. Very different once more: a trip to Lincoln, under 50 miles away, or any mileage on the A1(M), under 50 miles from Butterwick, where your engine kept working hard.
Driven on until it complained — clattering, smoke, an uneven idle, a dead throttle. The fuel isn't acting like diesel any more, and your engine is saying so. Leave it wherever it has stopped: a lay-by, a quiet street, the verge on Sea Lane. The drain and flush-through still come first, and they take care of it: when a car is stopped early, long-term damage is very uncommon.
Butterwick drivers and that petrol in a diesel myths they hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Topping up takes out nothing; it gives you a fuller tank of the same mixture. That advice supposes a diesel fuel system tolerates petrol by percentage. It does not.
If anything, the reverse holds. Myth: "A newer diesel can cope with a bit of petrol." At higher pressure, through more precise components: that is how a modern diesel handles its fuel, so the protection matters more, not less.
One myth that catches drivers out: if it starts and drives, it must be unharmed. Diesel in a petrol motor generally means a motor that will not run: the driver stops, and so does the harm. Whilst your pump grinds, a diesel fed petrol normally starts, ticks over and drives away as though nothing has happened. A running engine does not mean fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct problem. What petrol has diluted remains weakened, and that petrol stays inside your tank anyway.
The next start sends petrol back round your pump from the lines and your filter, where some of it sits once the motor has been run. That is why draining the tank yourself does not sort it — a myth. It is also really dangerous to drain petrol into a can by the kerbside.
How it happens: petrol in a diesel
Carelessness is rarely the cause, and nobody means to do it. A diesel nozzle generally won't go into a petrol vehicle, but the narrower petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one mistake simple, and just in that direction.
When routine and your car stop matching, it takes place. A new vehicle, a hire car or a courtesy car. A household with one petrol and one diesel on the drive. The pumps in a different order on a well-known forecourt. Rushing for a train outside Boston and fuelling up en route. A new-to-you diesel Volkswagen Golf, its first fuelling, and a motorist accustomed to petrol: precisely when it happens. Add rain, a phone call or a back seat full of kids, and your hand does what it has always done.
Preventing petrol in a diesel next time you fill up around Butterwick
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, though most usually do. Check the pump's label; the colour is only a hint.
- The first fill in a strange car is the time to check your filler flap — on it, or on the cap, plenty of motors state which fuel to use.
- A coloured fob or a sticker on your diesel's key achieves more than any amount of meaning to remember, in a home with one of each.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the pump. It sounds daft and it does the trick.
- Mistakes like this are easy to make whilst your mind is on something else, so the phone goes away.
- Add-on devices exist for cars without one, and some diesels are built with a filler that will not take a petrol nozzle. Useful — but a backstop only, never a reason to stop checking the label.
- As soon as you realise, stop: less petrol in the tank means a thinner mix. What to do next does not change, though — still don't crank it.
Put petrol in a diesel in Butterwick already?
The order of things is short, then. Do not switch the ignition on, and do not crank it. If you are still at the forecourt — Gulf or anywhere else — ask the staff to help you roll it away from the pump. Ring 0333 366 0103 next, with three answers — your fuel, the rough quantity, and whether it has run.
Corrosion and deposits form the trouble with AdBlue, whereas petrol means lost lubrication. So if it was AdBlue, say so — and read its own Butterwick page.
What makes one Butterwick petrol in a diesel task cost more than the next
The four scenarios above are four different jobs, so no single price for this would be honest. Which of them you're in is chiefly what shifts your cost. Beyond that it is the share — how much petrol went in against how much your tank takes — and then where your car is and whether a van can get to it safely.
What got in, how much, and whether it has run — three queries we ask before quoting, not after, for precisely that reason. Those answers are what change a range into one firm number.
About Butterwick itself
Butterwick is a small coastal village in Lincolnshire, situated near the mouth of the Haven, with a low elevation of around 6 metres above sea level. Butterwick lies within a short distance of other nearby villages, including Benington, Brand End, and Freiston. Butterwick has a population of approximately 843 residents, who mostly live in detached houses. Butterwick is located about 30 miles from the city of Lincoln and around 102 miles from London.
Fuel drain cover across Lincolnshire, Butterwick included
Butterwick rests in the PE postcode area, and our teams that answer petrol in diesel calls there work the spots near it as well — Benington, Brand End and Freiston among them. The vehicle doesn't need to come to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
In Butterwick and still at the pump?
The best spot there is, then — that's where you are. Leave the car turned off, and ring.