Brookfoot: Petrol in a Diesel Car? How Worried to Be
Likely less than you already are — as long as no one has started the car. Petrol sitting in a diesel tank does nothing to the engine till something draws it through your fuel system — the ignition priming the pump, your starter, or driving on its own. So the fair answer to the first query anyone in Brookfoot asks, "have I ruined it?", is usually no. Leave your motor off and ring Petrol in Diesel — that keeps it like that. Further down, this page sets out what petrol really does inside a diesel, how far it may have gone, and how to stop it happening to you again.
Your engine and petrol in a diesel: what happens
Diesel has two tasks on its way through a motor. It protects to begin with, and after that does it burn. Built to extremely fine tolerances, the fuel injectors and the pump depend on the diesel moving through them to keep their surfaces from wearing against one another.
Of these two jobs, petrol handles the first badly and the second never. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, so a pump on the blend to wear itself. It's equally made to resist igniting under compression — the opposite of what a diesel needs — which is why you get the rattling.
Together, those make the shape of the problem clear. Not contact but movement is what causes the damage. Petrol in a tank is a fuel problem. The beginning of a mechanical one is a pump that has been working on that petrol — and whatever a worn pump sheds moves on with the fuel to the injectors downstream.
Brookfoot, petrol in a diesel: four situations, from mild to serious
Fuelled but never started — the best it gets. Just the tank has petrol in it, and so the task is clearing that tank and cleaning your system where the car sits. This situation can only truly occur at a forecourt: anywhere else, the vehicle got there by being driven.
A moment's running, or just your ignition on. Petrol has left that tank and got to your filter and the fuel lines, because the system has been primed. Drain, flush, see to the filter: still normally straightforward.
Driven a couple of miles. Now the pump has spent those miles working on diluted fuel. Tank, lines, filter, then clean fuel run through the entire system: that is this work, and the way the car was driven matters as much as the distance. Short trips, like the school run to St Andrew's CofE (VA) Junior School, are one thing. Any miles on the M62, under 3 miles from Brookfoot, means the motor has worked hard throughout, and a run to Bradford, under 10 miles away, is a very different task as well.
Clattering, a ragged idle, smoke, a throttle gone soft: driven until it complained. That is your engine telling you its fuel no longer is behaving like diesel. Pull up wherever you are — the verge on Elland Road, a lay-by, a side street — and leave the car where it is. Lasting damage is very unusual if a vehicle is pulled over soon, and the drain and flush that still go first take care of it.
What Brookfoot drivers get told about petrol in a diesel — and the stories in it
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It won't. Nothing is removed by topping up — you're left with a fuller tank, still the same mixture. The idea behind the advice — that diesel fuel systems tolerate petrol by percentage — is wrong.
Myth: "A current diesel can cope with a bit of petrol." If anything, the reverse. A modern diesel runs its fuel through more precise components at higher pressure, which makes the protection count more, not less.
"It starts, it drives, so no harm done" — the myth that trips up most motorists than any other. Feed diesel to a petrol engine and it usually won't run, and so the driver stops — and the harm stops with them. A diesel fed petrol normally starts, idles and drives away as though nothing has happened, whilst your pump grinds. Running is not the same as fine.
Myth: a two-stroke additive makes it safe to drive home. It is an old workaround, meant for another issue. That petrol is still in your tank after that, and whatever it has weakened isn't put back.
"Drain it yourself and you're sorted" — a myth, since after it has been running some petrol lies in the fuel filter and lines, ready to go straight back through your pump on the next start. Besides, petrol drained into a can by the road is truly dangerous.
Petrol in a diesel: how does it take place?
It is rarely carelessness, and no one does it on purpose. A diesel nozzle generally will not go into a petrol vehicle, but the narrower petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one error straightforward, and only in that direction.
It occurs when routine and the car stop matching. A new motor, a hire car or a courtesy car. A household with one petrol and one diesel on the driveway. A well-known forecourt with the pumps in a different order. A rushed fill on the way to Brighouse with a train to catch. A new-to-you diesel Volkswagen Golf, its first fuelling, and a driver used to petrol: exactly when it takes place. Add rain, a phone call or a back seat full of kids, and the hand does what it has always done.
Next time you fill up in Brookfoot: preventing petrol in a diesel
- The label is what counts, and so read the pump instead of the colour: in the UK unleaded handles are usually green and diesel black, but not on each forecourt.
- The first fill in a strange vehicle is the time to check your filler flap — inside it, or on the cap, many cars state which fuel to use.
- Good intentions count for less than a sticker or a fob in a bright colour on your diesel's key when a household has one of each. So mark it.
- "Diesel", aloud, before you pick up the nozzle — each time a new or hired car gets its first tank. It sounds daft. It works.
- Whilst 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 are available for motors without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop reading the petrol pump.
- The moment you notice, stop: less petrol in the tank means a weaker blend. What to do next doesn't change, though — still don't fire it up.
Put petrol in a diesel around Brookfoot already?
Then the order of things is short. Starting it is out, and so is switching on the ignition. Ask the attendants to help you push it away from the pump if you're still at the forecourt, whether that is Tesco or somewhere else. What got in, about how much, and if it's run: tell us those when you phone 0333 366 0103.
Corrosion and deposits form the trouble with AdBlue, whereas petrol means lost protection. So if it was AdBlue, say so — and see its own Brookfoot page.
One petrol in a diesel job in Brookfoot costs more than another. Why?
There is no honest single quote for this, because the four situations above are four different jobs. Chiefly, your cost shifts with which situation you are in. The share matters next, meaning how much of your tank is petrol, and then the position of the car and whether getting to it is safe for a van.
That's why we ask three queries before costing rather than after: what was put in, how much, and whether it has run. Those replies are what turn a range into one firm number.
About Brookfoot and where it is
Brookfoot is a suburban area in West Yorkshire, situated near the lakeside at an elevation of 68 metres. Brookfoot lies approximately 6.2 miles from Bradford and is surrounded by nearby places such as Slead Syke and Brighouse. Brookfoot has a population of around 2132 people and predominantly features terraced housing. Brookfoot is located about 167.2 miles from London, in the Yorkshire and the Humber region.
Fuel drain cover across West Yorkshire, Brookfoot included
Brookfoot sits in the HD postcode area, and the vans that answer petrol in diesel call-outs there work the spots near it as well — Slead Syke, Brighouse and The Crescent among them. We drain where your vehicle is — your own drive, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
Brookfoot: still at the petrol pump?
The best spot there is, then — that's where you are. Phone, and keep it turned off.