Should You Worry? Petrol in a Diesel Car in Bushbury
Provided it has not been started, worry less than you likely are. "Have I wrecked it?" is the first question everyone in Bushbury asks, and the truthful answer is normally no, since petrol resting in a diesel tank hurts nothing until it is dragged through your fuel system — by ignition priming, by your starter, or by driving. Leave the engine off and phone Petrol in Diesel — that keeps it like that. Further down, this page sets out what petrol actually does inside a diesel, how far it may have gone, and how to stop it happening to you again.
The engine and petrol in a diesel: what happens
On its way through a motor, diesel does two jobs. It burns, and before it burns it lubricates. The high-pressure pump and the injectors are built to very fine gaps, and the diesel passing through them is what keeps those surfaces from wearing against each other.
Poorly at the first, not at all at the second: that's petrol. The clattering comes from petrol being made not to ignite when compressed, which is precisely the opposite of what a diesel needs. On top of that it is runnier than diesel, it strips out the lubrication the system rests on, and any pump working on that blend is wearing itself.
Put those together and the shape of the problem is clear. It is movement that does the harm, not contact. Where the petrol is only in that tank, it is a fault of fuel, nothing more. The beginning of a mechanical problem is a pump that has been labouring on that petrol — and whatever a worn pump sheds moves on with your fuel to your injectors beyond it.
Petrol in a diesel around Bushbury: how bad is it? Four cases
Filled but not once started — the best it gets. Being on a forecourt is what makes this possible: elsewhere, the car has been driven there to begin with. With that petrol held in your tank alone, it's drained and flushed on the spot, and nothing more is needed.
A moment's running, or just the ignition on. Petrol has come out of that tank and reached your filter and the lines, since your system has been bled. Normally nothing more than emptying, flushing and seeing to the fuel filter, and so still easy.
A few miles driven, and your pump has spent each of them working on thinned fuel. Mileage is only half of it; how hard it was driven counts equally. Either way the work includes the tank, the lines, your filter and fresh fuel through the whole circuit. Driving the kids to Northwood Park Primary School is one kind of trip. Very different a second time: a trip to Wolverhampton, under 5 miles away, or any distance on the M54, under a mile from Bushbury, where the engine never stopped labouring hard.
Rattling, an uneven idle, smoke, a throttle gone soft: driven until it complained. What you are hearing is your engine reporting fuel that no longer acts like diesel. Pull up on the spot — on the verge on Egerton Road, at the kerb, down a side road — and don't move it again. The fuel drain and flush still come first, and they deal with it: when a car is stopped quickly, long-term damage is very unusual.
Petrol in a diesel myths Bushbury motorists hear
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. A fuller tank of the same mixture is all it gives, because topping up removes nothing. A diesel fuel system doesn't tolerate petrol by percentage in the way that advice presumes.
Myth: "A newer diesel can cope with a bit of petrol." If anything, the opposite. Protection matters more on current diesels, not less, since their fuel runs through smaller components at higher pressure.
The myth that catches drivers off guard: if it starts and drives, it must be unharmed. Any petrol engine fed diesel normally won't run, so the motorist stops and the damage stops with them. Feed petrol to a diesel and it usually starts, ticks over and drives away like nothing happened — all while its pump wears. Running isn't the same as fine.
Myth: "Add some two-stroke oil and drive the car home." It is an outdated fix for a different problem. It does not put back what petrol has diluted, and the petrol is still inside that tank later on.
The next start draws petrol back round the pump out of the lines and the fuel filter, where some of it sits once your engine has run. That's why draining your tank yourself does not sort it — a myth. It is also truly dangerous to drain petrol into a can at the kerbside.
How it happens: petrol in a diesel
On purpose? Never. Through carelessness? Seldom, if ever. One way only, because of the nozzles: the narrower petrol one slides inside a diesel filler with almost no resistance, while the diesel one generally won't fit a petrol motor. That is how the forecourt makes it simple.
It occurs when habit and the car stop matching. Any vehicle that is new to you — a hire car, on loan as a courtesy car, or brand new. A household with one petrol and one diesel on the driveway. The pumps in a different order on a familiar forecourt. A hurried fill on the way to Wolverhampton with a train to catch. Exactly the moment it happens: after years of driving petrol, a driver fills a diesel Renault Megane for the first time. The hand repeats what it has always done when you add rain, a phone call or a back seat full of kids.
Avoiding petrol in a diesel next time you fill up around Bushbury
- Check the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, but not on each forecourt. The label is what counts.
- Check the filler flap. Plenty of cars state the fuel inside the flap or on the cap. Look at it on the first fill in a motor you don't know.
- A coloured fob or a sticker on the diesel's key achieves more than any amount of meaning to remember, for a house with one of each.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump. It sounds daft and it works.
- Put your phone away. This is an easy mistake to make whilst you're thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler built to refuse a petrol nozzle, and aftermarket devices are available for the remainder. Count it as a backstop, and keep checking the petrol pump.
- Stop as soon as you realise. Less petrol in your tank means a thinner blend. It doesn't change what to do next, which is still not to start the vehicle.
Petrol already in a diesel around Bushbury? Start here
Then the order of things is brief. Don't switch your ignition on, and do not start it. Still on the forecourt, at BP or anywhere else? Ask the staff to help you roll the car away from the petrol pump. Call 0333 366 0103 next, with three facts — the fuel, the approximate quantity, and if it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a different fault — Bushbury has a page just for it.
One petrol in a diesel task around Bushbury costs more than another. Why?
A fair single price doesn't exist here: four situations, four separate jobs. Which of them you're in is chiefly what shifts the cost. Two things come after that: the petrol that got in as a proportion of what your tank holds, then the spot the vehicle is in and whether a technician can reach it safely.
What was put in, how much, and if it's run — three queries our engineers ask before costing, not after, for precisely that reason. A range turns into a straight figure once the replies are in.
About Bushbury, briefly
Bushbury is a suburban area located near Wolverhampton in the West Midlands, sitting at an elevation of around 124 metres. Bushbury is characterized by its predominantly semi-detached housing stock and is situated approximately 3.1 miles from the city centre. Bushbury is close to other nearby places such as Moseley, Fordhouses, and Underhill, and is about 114.5 miles northwest of London. Bushbury has a population of around 4856 people.
Fuel drain cover across West Midlands, Bushbury included
Bushbury waits in the WV postcode area, and our teams that answer petrol in diesel jobs there work the places near it as well — Moseley, Fordhouses and Underhill among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all locations our engineers work, and your car doesn't need to come to us.
At the petrol pump around Bushbury, still?
Nothing beats it: that's where you are. Keep it off. Phone.