Hatfield Chase: Petrol in a Diesel Car? How Worried to Be
Unstarted? Then less worried than you likely feel. Everyone in Hatfield Chase begins with "have I ruined it?", and the fair answer is usually no: petrol left in that tank of a diesel stays harmless till priming, cranking or driving pulls it into the fuel system. Leave the engine off then ring Petrol in Diesel — that keeps it that way. What petrol really does to a diesel, how to judge how far it's gone, and how to stop it from happening again: that is the rest of this page.
What petrol in a diesel does to the engine
Two jobs fall to diesel on its route through a motor. It burns, and before it ignites it lubricates. What stops the surfaces inside your high-pressure pump and the injectors from wearing down against each other is the diesel flowing through them — they're made to extremely fine clearances.
Badly at the first, not at all at the second: that is petrol. The rattling comes from petrol being made not to ignite when compressed, which is precisely the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips out the protection your system rests on, and any pump running on that mixture is wearing itself.
Put those together and the shape of the trouble is clear. It is circulation that does the harm, not contact. Any tank with petrol in it is a fuel fault. After your pump has been labouring on that petrol, a mechanical issue has begun: whatever is shed by a pump that is wearing is carried downstream to the fuel injectors with the fuel.
Petrol in a diesel in Hatfield Chase: how serious is it? Four cases
Fuelled, and not started: nothing beats it. The petrol is inside your tank and only the tank, and the job is a drain and a flush where the car stands. This is the one scenario that can only truly happen at a forecourt, because anywhere else your car has been driven to get there.
Started for a second, or just the ignition on. Petrol has come out of your tank and reached the filter and the fuel lines, because the system has been primed. That is generally still a simple job — a drain, a flush, and the fuel filter dealt with.
Driven a few miles. Now the pump has spent those miles working on diluted fuel. The work is that tank, your lines, the filter and fresh fuel through the entire circuit, and how hard the vehicle was driven matters as much as how far. A school run to Brooke Primary Academy is one matter. Very different a second time: a trip to Doncaster, under 10 miles away, or any miles on the M180, under a mile from Hatfield Chase, where the engine never stopped working hard.
Driven till it protested. Clattering, an uneven idle, smoke, a throttle that has gone soft. The fuel is not acting like diesel any more, and the engine is telling you. Whether it is the verge on High Levels Bank, a lay-by or a side street, stop there and leave it. Lasting damage is very unusual when a vehicle is pulled over early, and the drain and flush that still come first sort it out.
Stories Hatfield Chase motorists hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Topping up removes nothing; it gives you a fuller tank of the same mixture. The assumption behind that advice — that diesel fuel systems tolerate petrol by percentage — is wrong.
"Newer diesels can handle a little petrol" — a myth, and nearer the opposite. More precise parts and higher pressure are how a modern diesel runs its fuel, and that makes the protection matter more, not less.
"It starts, it drives, and so there is no harm" — the myth that trips up more drivers than any other. Diesel in a petrol motor usually means a motor that will not run: the motorist stops, and so does the harm. A diesel fed petrol normally starts, idles and drives away as though nothing has happened, whilst your pump grinds. Fine and running aren't the same thing.
An outdated fix for a different problem is behind this one. Myth: "Add some two-stroke oil and drive it home." None of what petrol thinned gets put back by it — and later, your tank still contains the petrol.
Myth: "Drain that tank yourself and you're sorted." Once your engine has run, some of the petrol is no longer inside that tank: it's in the filter and the lines, and it goes straight back through your pump at your next start. It's also genuinely hazardous to drain petrol into a can at the roadside.
Petrol in a diesel: how does it occur?
On purpose? Never. Through carelessness? Seldom, if ever. The petrol nozzle is the slimmer of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally won't go into a petrol car at all. The forecourt makes it simple, and the error runs one way.
The moment habit stops matching your car is the moment it happens. A new vehicle, a hire car or a courtesy car. Households running one of each, petrol and diesel. The pumps in a different order on a familiar forecourt. A train to catch, and a rushed fill en route to Thorne South. The first fill-up in a diesel Renault Megane after years of driving petrol is precisely the moment it takes place. With rain, a call coming in, or a car full of children to deal with, your hand simply does what it has always done.
Preventing petrol in a diesel next time you fill up around Hatfield Chase
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most usually do. Read the petrol pump's label; the colour is just a clue.
- In a car you don't know, look inside the flap over the filler or at the cap before the first fill: plenty of cars print the fuel there.
- Label the key. In a home with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember.
- Before the nozzle comes off the petrol pump the first time you fill a hired or new car, say "diesel" out loud. Silly, perhaps, yet it works.
- While you're thinking about something else, this is an easy mistake to make — so tuck your phone away.
- Some diesels have a filler built to reject a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the petrol pump.
- Noticing it mid-fill? Stop at once. A weaker mixture follows from less petrol inside that tank, yet your next step remains the same: don't start it.
Hatfield Chase: already put petrol in a diesel?
The order of things is brief, then. Leave it unstarted, with the ignition switched off as well. If you're still on the forecourt — Texaco or anywhere else — ask the attendants to help you roll the vehicle clear of the pump. Next, 0333 366 0103. We'll ask what got in, roughly how much, and if it has been run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a separate fault — Hatfield Chase has a page just for it.
What makes one Hatfield Chase petrol in a diesel task cost more than the next
There's no fair single price for this, since the four scenarios above are four different tasks. The scenario itself does most of the work of moving the cost. After that it's the share — how much petrol got in against how much that tank holds — and after that where your car is and whether our van can get to it safely.
Before any quote, not after, we ask three questions: your fuel that went in, the quantity, and whether it has run. That's why. A range becomes a straight figure once those answers are in.
About Hatfield Chase, for a moment
Hatfield Chase is a low-lying locality in South Yorkshire, situated near the towns of Doncaster and Thorne. Hatfield Chase has a population of around 562 people and is characterised by detached housing. Hatfield Chase is located close to several nearby places, including Wike Well End, Brierholme Carr, and Canal Side, and is approximately 147.5 miles north of London.
Across South Yorkshire and in Hatfield Chase: fuel drain cover
Hatfield Chase rests in the DN postcode area, and the teams that answer petrol in diesel call-outs there work the locations around it as well — Wike Well End, Brierholme Carr and Canal Side among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all locations our technicians work, and the car does not need to come to us.
At the petrol pump in Hatfield Chase, still?
The best position there is, then — that's where you are. Leave the vehicle turned off, then ring.