Should You Worry? Petrol in a Diesel Car in Majors Green
Provided it hasn't been started, worry less than you likely are. "Have I ruined it?" is the first thing everyone around Majors Green asks, and the honest answer is usually no, because petrol resting in a diesel tank harms nothing until it is drawn through the fuel system — by ignition priming, by your starter, or by driving. To keep the vehicle like that, phone Petrol in Diesel and leave your engine alone. The rest of this page explains what petrol really does to a diesel, how to tell how far it has got, and how to make sure it does not happen to you a second time.
Inside the engine: what petrol in a diesel really does
On its way through a motor, diesel does two jobs. It combusts, and before it ignites it lubricates. The high-pressure fuel pump and the fuel injectors are designed to very fine tolerances, and your diesel passing through them is what keeps those surfaces from grinding against one another.
Badly at the first, not at all at the second: that is petrol. A pump working on a petrol blend is wearing itself out, because petrol is runnier than diesel and takes away the protection your fuel system relies on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel wants from its fuel — and that is where the rattling starts.
Combined, those leave the shape of the trouble plain. The damage is done by circulation, not by contact. Petrol in a tank is a fuel fault. A pump that has been running on that petrol is the start of a mechanical one, and whatever a worn pump sheds travels on with your fuel to the fuel injectors downstream.
Majors Green, petrol in a diesel: four situations, from mild to serious
Fuelled up, not once started. The best case there can be. Being at a forecourt is what makes this possible: elsewhere, the vehicle has been driven there to begin with. With the petrol held in that tank alone, it's emptied and cleaned right where it stands, and nothing more is needed.
Ignition on, or started for a second. Petrol has come out of that tank and reached your filter and the lines, because your system has been primed. Still usually easy: drain, flush, and your filter sorted.
Some miles driven, and the pump has spent each of them labouring on weakened fuel. Tank, lines, filter, then clean fuel run through the whole circuit: that's the work, and the way the car was driven matters as much as the mileage. Short trips, such as the school run to Mill Lodge Primary School, are one thing. A run as far as Birmingham, under 10 miles away, is a very different task. So is any miles on the M42, under 5 miles from Majors Green, where your engine has been working hard throughout.
Driven until it complained. Clattering, a lumpy idle, smoke, a throttle that has gone soft. The engine is telling you the fuel is no longer behaving like diesel. Stop where you are — on the verge on Rolan Drive, at the kerb, down a side road — and do not move it. What goes first is still the fuel drain and flush-through, and that deals with it, with lasting damage very unusual when a vehicle is stopped soon.
What Majors Green people get told about petrol in a diesel — and the stories in it
False: topping up to full with diesel makes it fine. It doesn't. Nothing is removed by topping up — you're left with a bigger tank, still the same mix. Percentage isn't how a diesel fuel system copes with petrol, however much that advice presumes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. At higher pressure, through more precise components: that's how a modern diesel moves its fuel, so the protection matters for more, not less.
"It starts, it drives, and so no harm done" — the myth that catches most motorists than any other. The driver of a petrol motor fed diesel normally has no choice but to stop, because it will not run, and the damage stops with them. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually will; meanwhile your pump wears. Running is not the same as fine.
Not so: a two-stroke additive makes it safe to drive home. It is an old workaround, meant for another problem. It does not put back what petrol has diluted, and that petrol is still inside your tank after that.
Myth: "Drain that tank yourself and you are sorted." After the motor has been run, some of that petrol is no longer in the tank: it is in the filter and the fuel lines, and it goes right back through the pump on the next start. Besides, petrol cleared into a can by the road is truly risky.
Why petrol in a diesel happens so easily
It is rarely carelessness, and no one does it on purpose. The petrol nozzle is the smaller of the two and slips into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol motor at all. The forecourt makes it simple, and the slip runs one way.
The moment routine stops matching your car is the moment it takes place. A new motor, a hire car or a courtesy car. Households running one of each, petrol and diesel. A forecourt you know, only with its pumps arranged differently. Racing for a train outside Whitlocks End and filling up en route. Years of petrol motors behind you, a diesel Renault Megane in front of you on the forecourt for its first tank — that is when. With rain, a call coming in, or children to deal with, your hand just does what it always has.
How to avoid petrol in a diesel on your next fill-up around Majors Green
- Read the pump, not the colour. In the UK unleaded handles are normally green and diesel black, yet not on each forecourt. The label is what matters.
- Many motors state the fuel inside your filler flap or on the cap, and so check there on the first fill in a vehicle you do not know.
- A coloured fob or a sticker on the diesel's key does more than any amount of intending to remember, in a home with one of each.
- Before the nozzle leaves the pump the first time you fill a hired or new vehicle, say "diesel" out loud. Daft, yes, but it does the trick.
- Tuck the phone away. This is an easy mistake to make whilst you are thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler built to reject a petrol nozzle, and aftermarket devices exist for the remainder. Treat it as a safety net, then keep checking the petrol pump.
- Spotting it halfway? Stop at once. A weaker blend results from less petrol inside the tank, yet your next stage stays the same: do not start the vehicle.
Petrol already in a diesel around Majors Green? Start here
Then the order of things is brief. Leave it unstarted, with your ignition switched off too. If you're still on the forecourt — BP or anywhere else — ask the attendants to help you push it clear of the pump. Next, 0333 366 0103. We will ask what got in, roughly how much, and if it's been run.
Say so if it was AdBlue instead of petrol: it is a different issue, with its own page for Majors Green, because AdBlue brings corrosion and deposits instead of lost protection.
What makes one Majors Green petrol in a diesel task cost more than the next
An honest single quote does not exist here: four situations, four separate tasks. The situation itself does most of the work of moving the cost. Where the vehicle is matters too, and whether our van can safely get to it, after the share of petrol to what your tank holds.
Ahead of any quote, not after, we ask three questions: the fuel that got in, its volume, and if it's run. That is why. A range becomes a straight figure once the replies are in.
About Majors Green itself
Majors Green is a village in Worcestershire, situated on the riverside at an elevation of around 135 metres. Majors Green lies close to the city of Birmingham, approximately 6 miles to the west, and is near other local places such as Truemans Heath and Whitlocks End. Majors Green has a population of around 976 residents, predominantly living in semi-detached housing. Majors Green is located about 95 miles northwest of London, in the West Midlands region.
Majors Green and Worcestershire: where our fuel drain cover runs
Majors Green waits in the B postcode area, and the vans that answer petrol in diesel jobs there work the places around it as well — Truemans Heath, Solihull Lodge and Whitlocks End among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all spots we drain, and the vehicle doesn't need to come to us.
Still at the petrol pump in Majors Green?
Then, you couldn't be in a better position. Switched off it stays; then call.