Petrol in a Diesel Car in Crowdhill: How Worried Should You Be?
Far less than you likely are, provided it hasn't been started. Petrol sitting in a diesel tank does nothing to the motor until something draws it through the fuel system — your ignition priming your pump, the starter, or the drive on its own. So the fair answer to the first query anyone around Crowdhill asks, "have I wrecked it?", is usually no. To leave the vehicle that way, phone Petrol in Diesel then leave the motor switched off. The rest of this page sets out 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 again.
Your engine and petrol in a diesel: what goes on
Diesel does two tasks on its way through an engine. It combusts, and before it combusts it lubricates. What stops the surfaces inside your high-pressure pump and the injectors from grinding against one another is your diesel flowing through them — they're made to extremely fine tolerances.
Badly at the first, not at all at the second: that's petrol. The rattling comes from petrol being designed 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 lubrication the system rests on, and any pump running on that mixture is wearing itself.
Put those together and the shape of the problem is clear. Contact does not do the harm — circulation does. Any tank with petrol in it is a fuel problem. Whatever a worn pump sheds travels on, carried by your fuel, into the injectors downstream, which is why a pump that has worked on that petrol is where a mechanical problem starts.
Crowdhill, petrol in a diesel: four cases, from mild to significant
Filled up, and never started: no case is better. The petrol is inside the tank and just the tank, and the job is a drain and a flush where the vehicle sits. This is the one situation that can only really take place at a forecourt, as anywhere else the car has been driven to get there.
Your ignition turned on, or a short start. With the system primed, the fuel lines and filter now hold petrol that has come from your tank. Normally nothing more than clearing, rinsing and sorting the fuel filter, and so still easy.
A couple of miles driven, and the pump has spent every one of them labouring on weakened fuel. Miles is only half of that; how hard it was driven counts equally. Either way the work runs to that tank, your lines, the filter and fresh fuel through the entire system. On the school run to Stoke Park Infant School, the mileage is short. Any distance on the M3, under 3 miles from Crowdhill, means the engine working hard throughout, and a run to Winchester, under 10 miles away, makes a very different task as well.
Driven on till it protested — rattling, smoke, a lumpy idle, a dead throttle. What you are hearing is the engine reporting fuel that no longer behaves like diesel. Whether it's the verge on Hill Close, a lay-by or a side road, stop there and leave it. Long-term damage is very uncommon when a car is stopped quickly, and the fuel drain and flush that still come first take care of it.
Crowdhill drivers and the petrol in a diesel myths they hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." A bigger tank of the same mix is all it gives, since topping up removes nothing. The idea behind the advice — that diesel fuel systems tolerate petrol by percentage — is wrong.
"Newer diesels can handle a little petrol" — a myth, and closer to the reverse. Lubrication matters more on current diesels, not less, because their fuel runs through finer parts at higher pressure.
"It starts, it drives, and so no harm done" — the myth that catches most motorists than any other. Diesel in a petrol motor normally leaves a motor that won't run: the motorist stops, and so does the damage. A diesel fed petrol generally starts, idles and drives away as if nothing has happened, whilst the pump wears. Being able to run isn't the same as being fine.
Myth: a two-stroke additive makes it safe to drive home. It is an old workaround, supposed for another issue. The petrol is still in the tank after that, and what it has diluted is not put back.
Once the motor has run, part of the petrol sits in the filter and the fuel lines, not your tank — and the next start pulls it straight back through the pump. So the myth "drain your tank yourself and you are sorted" doesn't hold. And, a can of petrol filled by the kerbside is truly hazardous.
How petrol ends up: petrol in a diesel
No one does it on purpose, and it's rarely carelessness. The forecourt makes it simple: the petrol nozzle is the narrower of the two, and it slips into a diesel filler with almost no resistance, while a diesel nozzle mostly won't go into a petrol motor at all. So the mistake runs one way.
It occurs when routine and your car stop matching. A vehicle that's new to you — a hire car, on loan as a courtesy car, or just bought. A household with one petrol and one diesel on the driveway. The pumps in a different order on a familiar forecourt. Filling up in a hurry en route to Eastleigh, with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Tiguan in front of you at the forecourt for its first tank — that is when. With rain, a call arriving, or children to deal with, your hand simply does what it always has.
How to prevent petrol in a diesel on your next fill-up around Crowdhill
- Read the petrol pump, not the colour. In the UK unleaded handles are usually green and diesel black, but not on each forecourt. The label is what counts.
- In a motor you don't know, look inside the flap over the filler or at the cap before your first fill: plenty of cars state the fuel there.
- One of each in the home? Mark your key to your diesel — a coloured fob, a sticker — since meaning to remember is not enough.
- It sounds daft and it does the trick: on your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the pump.
- Whilst you're thinking about something else, this is an easy mistake to make — so put the phone away.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to refuse a petrol nozzle, and add-on devices are available for cars without one. They are a safety net, not a reason to stop checking the pump.
- As soon as you realise, stop: less petrol in that tank means a weaker blend. What to do next doesn't change, though — still do not crank it.
Crowdhill: already put petrol in a diesel?
Then, there is just a short order of things. Starting it is out, and so is turning on your ignition. The staff at the forecourt — whether at Esso itself or wherever you filled up — will normally help push it clear of the petrol pump if you ask. Ring 0333 366 0103 next, with three facts — the fuel, the approximate quantity, and whether it has run.
Say so if it was AdBlue instead of petrol: it is a separate fault, with its own page for Crowdhill, because AdBlue brings corrosion and deposits rather than lost lubrication.
Why one petrol in a diesel task in Crowdhill costs more than another
Four separate tasks lie behind the four situations above — which is why there is no honest single quote. Which of them you are in is chiefly what moves your cost. The ratio counts next, meaning how much of that tank is petrol, followed by the location of your car and whether getting to it is safe for a van.
Three queries come first, before any quote, rather than after — what was put in, how much, has it run — and this is the reason. A range turns into a straight figure when the replies are in.
About Crowdhill
Crowdhill is a small village in Hampshire, situated on the riverside at an elevation of 58 metres, with detached housing being the predominant type of accommodation. Crowdhill lies near the city of Winchester, approximately 5.8 miles away, and is also close to other nearby places such as Fishers Pond and Fair Oak. Crowdhill is part of a wider rural area in the South East region, with London being around 62.6 miles distant. Crowdhill has a population of around 583 residents.
Fuel drain cover across Hampshire, Crowdhill included
Our vans answering petrol in diesel jobs around Crowdhill, in the SO postcode area, equally work the spots around it, Fishers Pond, Fair Oak and Nobs Crook included. Our engineers drain where the car is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
Crowdhill: still at the pump?
Then, you couldn't be in a better place. Call, and keep it switched off.