Should You Worry? Petrol in a Diesel Car in Eastbourne
Probably less than you are now — as long as no one has started the car. Everyone in Eastbourne begins with "have I ruined it?", and the fair answer is generally no: petrol resting inside the tank of a diesel remains harmless until priming, cranking or driving draws it into the system. To keep the car like that, ring Petrol in Diesel and leave the engine switched off. Read on for three things: the effect petrol has inside a diesel engine, the clues of how far it has spread, and ways to make sure you don't repeat it.
Inside the engine: what petrol in a diesel does
On its way through a motor, diesel does two tasks. Before it burns, it protects — then it burns. What keeps the surfaces inside the high-pressure fuel pump and the fuel injectors from grinding against each other is the diesel flowing through them — they are built to very fine tolerances.
Of those two tasks, petrol handles the first badly and the second never. A pump running on a petrol blend is wearing itself out, since petrol is thinner than diesel and strips out the protection your fuel system depends on. Petrol is also made to resist igniting under compression — the opposite of what a diesel wants from its fuel — and that is where any knocking comes.
Together, those make the shape of the trouble plain. The harm is done by movement, not by contact. Any tank with petrol in it is a fuel fault. After your pump has been labouring on that petrol, a mechanical problem has started: anything shed by a pump that is wearing is carried onward to the injectors with the fuel.
How bad is petrol in a diesel? Four scenarios we see around Eastbourne
Filled but never started — as good as it gets. Just the tank has petrol in it, so the job is emptying the tank and flushing your system where your car stands. This situation can only really happen on a forecourt: anywhere else, the car got there by being driven.
Your ignition switched on, or a short start. Your system has been primed, so petrol has left the tank and reached the filter and your lines. Drain, flush, see to the fuel filter: still usually simple.
Driven a few miles. Now your pump has spent these miles labouring on weakened fuel. Tank, lines, filter, then fresh fuel put through the whole system: that is the work, and the way your car was driven matters as much as the mileage. Short trips, such as the school run to Cherry Tree Academy, are one matter. A run as far as Wakefield, under 10 miles away, is a very different task. So is any mileage on the A1(M), under a mile from Eastbourne, where the engine has been running hard throughout.
It complained, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone uneven. The fuel is not behaving like diesel any more, and your motor is telling you. Leave it wherever it has stopped: a lay-by, a quiet street, the verge on Eastbourne Crescent. Long-term damage is very unusual if a vehicle is pulled over early, and the drain and flush-through that still come first take care of it.
Myths Eastbourne drivers hear about petrol in a diesel
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Topping up takes out nothing; it gives you a fuller tank of the same mixture. That advice assumes a diesel fuel system tolerates petrol by percentage. It doesn't.
"Newer diesels can handle a little petrol" — a myth, and closer to the reverse. A current diesel runs its fuel through smaller parts at higher pressure, which makes the lubrication count more, not less.
"It starts, it drives, so there is no harm" — the myth that catches most drivers than any other. Diesel in a petrol motor normally leaves a motor that will not run: the driver stops, and so does the harm. Feed petrol to a diesel and it usually starts, idles and pulls away like nothing happened — all the while its pump wears. Running doesn't mean fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a distinct issue. It does not put back what petrol has diluted, and that petrol is still inside the tank later on.
If your engine has run, part of that petrol sits in your filter and the lines, not that tank — and your next start sends it straight back through your pump. So the myth "drain that tank yourself and you're sorted" does not hold. Clearing petrol into a can by the kerbside is also really hazardous.
How does petrol in a diesel happen?
Carelessness is rarely the cause, and nobody means to do it. The forecourt makes it simple: the petrol nozzle is the slimmer of the two, and it slips into a diesel filler with almost no resistance, whilst a diesel nozzle generally will not go into a petrol motor at all. So the error runs one way.
It occurs when routine and the car stop matching. Any motor that's new to you — hired, on loan as a courtesy car, or just bought. Two vehicles on one driveway, one petrol, one diesel. The pumps in a different order on a well-known forecourt. Fuelling up in a hurry on the way to Pontefract Baghill, with a train to catch. Years of petrol motors behind you, a diesel Renault Clio in front of you on the forecourt for its first tank — that is when. Add a back seat full of kids, a phone call or rain, and the hand takes over.
Eastbourne drivers: how to avoid petrol in a diesel next time
- A green handle for unleaded and black for diesel is usual in the UK — but not on every forecourt. Go by the label on the pump, not the colour.
- In a motor you don't know, look inside the flap over your filler or at the cap before your first fill: many cars state the fuel type there.
- One of each in the household? Mark the key to the diesel — a bright fob, a sticker — since meaning to remember isn't enough.
- Before the nozzle leaves the pump the first time you fill a hired or new vehicle, say "diesel" aloud. Daft, perhaps, but it works.
- Tuck your phone away. This is an easy mistake to make whilst you're thinking about something else.
- Add-on devices exist for motors without one, and some diesels are built with a filler that will not accept a petrol nozzle. Helpful — but a safety net only, never a reason to stop checking the label.
- Stop the moment you notice. Less petrol inside that tank means a weaker mixture. It doesn't change what to do next, which is still not to start the car.
Put petrol in a diesel around Eastbourne already?
Short and simple, then, is the order of things. Starting it is out, and so is turning on the ignition. Yet at the forecourt, at Shell or anywhere else? Ask the attendants to help you push it away from the pump. Then phone 0333 366 0103 and tell us what got in, about how much, and if it's run.
Corrosion and deposits are the trouble with AdBlue, where petrol brings lost protection. So if it was AdBlue, say so — and see its own Eastbourne page.
What makes one Eastbourne petrol in a diesel job cost more than the next
The four situations above are four separate tasks, so no single price for this would be fair. What moves the cost is mostly which of them you're in. After that it's the share — how much petrol got in against how much the tank takes — and then where your car is and whether a van can get to it safely.
Ahead of any quote, not after, we ask three queries: your fuel that went in, the quantity, and whether it has run. That is why. Given those answers, you get a straight figure instead of a range.
About Eastbourne and its setting
Eastbourne is a suburban area in West Yorkshire, situated approximately 8.7 miles from Wakefield and 158.4 miles from London. Eastbourne sits at an elevation of around 55 metres, characterised by semi-detached housing and a mix of local amenities. Eastbourne is located near other residential areas, including Willow Park, Grove Town, and Chequerfield, and is home to a population of around 2752 people. Eastbourne forms part of the wider Wakefield urban area, with easy access to local services and facilities.
Fuel drain cover in Eastbourne and across West Yorkshire
Eastbourne sits in the WF postcode area, and our teams that answer petrol in diesel calls there work the spots near it as well — Willow Park, Grove Town and Chequerfield among them. No need to move your car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all spots we drain.
Eastbourne: still at the pump?
Then you're in the best place there can be. Keep the vehicle switched off, then ring.