Petrol in a Diesel Car in Bagworth: How Worried Should You Be?
Likely less than you already are — provided no one has started the car. Until your ignition primes the pump, your starter cranks, or the vehicle is driven, petrol in a diesel tank simply sits there and does nothing. Which means the truthful reply to the first Bagworth query — "have I wrecked it?" — usually no. Keep it that way: leave your motor off and phone Petrol in Diesel. What petrol really does to a diesel, how to gauge how far it's travelled, and how to keep it from happening again: that's the rest of this page.
Petrol in a diesel: what does it do to the motor?
Passing through an engine, diesel is doing two jobs at once. It burns, and before it ignites it protects. Made to very fine clearances, the fuel injectors and your pump rely on your diesel flowing through them to keep their surfaces from wearing against one another.
Badly at the first, not at all at the second: that's petrol. The clattering comes from petrol being designed not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips away the protection your system rests on, and any pump running on such a blend is wearing itself.
Put these together and the shape of the problem is plain. The harm is done by movement, not by contact. All a tank with petrol in it amounts to is a fuel fault. After your pump has been running on that petrol, a mechanical fault has begun: whatever is shed by a pump that's wearing down travels downstream to your injectors with the fuel.
Bagworth, petrol in a diesel: four situations, from mild to major
Fuelled, and never started: no case is better. The petrol is inside the tank and only that tank, and the job is a drain and a flush where the vehicle stands. This is the one situation that can only really happen on a forecourt, since anywhere else the car has been driven to get there.
A moment's running, or merely your ignition on. Petrol has left your tank and got to the fuel filter and the fuel lines, because your system has been primed. Still normally easy: drain, flush, and your filter sorted.
A few miles driven, and the pump has spent each of them working on thinned fuel. Tank, lines, filter, then fresh fuel run through the whole system: that's this work, and the way the vehicle was driven matters as much as the distance. Short trips, such as the school run to Thornton Primary School, are one matter. A run as far as Leicester, under 10 miles away, is a very different job. So is any distance on the M1, under 3 miles from Bagworth, where your engine has been working hard the whole time.
Driven on till it complained — rattling, smoke, a lumpy idle, a dead throttle. That is the engine telling you its fuel no longer is behaving like diesel. Leave it wherever it stops: a lay-by, a quiet street, the verge on Barlestone Road. Lasting damage is very uncommon when a car is pulled over soon, and the fuel drain and flush that still go first sort it out.
What Bagworth people get told about petrol in a diesel — and the myths in it
"Top it up the rest of the way with diesel and it will be fine" — a myth. It will not. Nothing is removed when you top up — the tank just carries more of the same blend. The idea behind the guidance — that diesel fuel systems accept petrol by percentage — is wrong.
Myth: a current diesel copes with a bit of petrol. Rather, the opposite. Lubrication matters more on current diesels, not less, since their fuel runs through more precise components at higher pressure.
This is the one that catches people. Myth: "If it starts and drives, there is no damage done." 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 generally starts, ticks over and drives away as if nothing has happened, while your pump wears. Being able to run is not the same as being fine.
Myth: "Add some two-stroke oil and drive the vehicle home." It is an old workaround for a separate issue. None of what petrol diluted is put back by it — and afterwards, your tank still contains the petrol.
Once your engine has run, part of that petrol is in the filter and the lines, not the tank — and the next start sends it straight back through your pump. So the myth "drain that tank yourself and you are sorted" does not hold. It is also genuinely dangerous to drain petrol into a can at the roadside.
How it happens: petrol in a diesel
A careless moment is seldom the cause, and nobody means to do it. The petrol nozzle is the smaller of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly won't go into a petrol motor at all. The forecourt makes it easy, and the mistake runs one way.
Habit and the vehicle falling out of step is when it takes place. A vehicle that's new to you — a hire car, on loan as a courtesy car, or just bought. One petrol and one diesel on the driveway of the same household. Your usual forecourt, its pumps suddenly in a different order. Racing for a train at Narborough and filling up en route. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it happens. Throw in a back seat full of kids, a phone call or rain, and habit wins.
Avoiding petrol in a diesel next time you fill up in Bagworth
- The label is what matters, and so read the petrol pump rather than the colour: in the UK unleaded handles are normally green and diesel black, yet not on every forecourt.
- The first fill in a strange vehicle is the time to check the filler flap — inside it, or on the cap, plenty of motors state which fuel they take.
- A coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember, for a house with one of each.
- It seems silly and it does the trick: on the first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump.
- Mistakes like this are straightforward to make whilst your mind is on something else, so your phone goes away.
- Add-on devices are available for vehicles without one, and some diesels are built with a filler that won't take a petrol nozzle. Useful — but a safety net only, never a reason to stop checking the label.
- Less petrol means a weaker mix, and so stop the moment you realise — while remembering that your next stage is unchanged. It is still not to fire it up.
Bagworth: already put petrol in a diesel?
Then the order of things is brief. Don't fire it up, and do not turn your ignition on. The staff at the forecourt — whether at Asda itself or wherever you filled up — will usually help push it clear of the pump if you ask. Ring 0333 366 0103 next, with three answers — the fuel, the rough volume, and whether it's run.
If it was AdBlue rather than petrol, say so. That's a different problem — corrosion and deposits instead of lost protection — and it has its own page for Bagworth.
One petrol in a diesel task in Bagworth costs more than another. Why?
The four scenarios above are four separate tasks, so no single price for this would be honest. What moves your cost is chiefly which of them you are in. The ratio matters next, meaning how much of the tank is petrol, followed by the position of the vehicle and whether reaching it is safe for a technician.
What got in, how much, and if it has run — three questions our engineers ask before pricing, not after, for precisely that reason. Those replies are what turn a range into one firm number.
About Bagworth
Bagworth is a small village in Leicestershire, situated approximately 9 miles west of Leicester, with a population of around 504 people. Bagworth sits in a rural area at an elevation of 169 metres, surrounded by nearby places such as Thornton and Newbold Heath. Bagworth is characterised by its predominantly detached housing stock, reflecting its role as a residential community. Bagworth remains a quiet village, located about 95 miles northwest of London.
Fuel drain cover in Bagworth and across Leicestershire
Our vans answering petrol in diesel call-outs around Bagworth, in the LE postcode area, also work the spots near it, Thornton, Battram and Newbold Heath included. The car does not need to come to us: our technicians drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
In Bagworth and still at the petrol pump?
The best position there is, then — that's where you are. Phone, and keep it switched off.