Should You Worry? Petrol in a Diesel Car in Hayes Park
Probably less than you already are — provided no one has started the vehicle. Everyone around Hayes Park starts with "have I ruined it?", and the fair answer is usually no: petrol left inside your tank of any diesel stays harmless until priming, cranking or driving pulls it into your fuel system. Keep it like that: leave the motor off then phone Petrol in Diesel. Below, 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.
Inside the engine: what petrol in a diesel does
On its way through a motor, diesel does two jobs. Oiling comes before burning; it does both. Designed to extremely fine tolerances, your injectors and your pump rely on the diesel moving through them to stop their surfaces wearing against one another.
Poorly at the first, not at all at the second: that is petrol. The rattling comes from petrol being made not to ignite when compressed, which is exactly the opposite of what a diesel needs. On top of that it is runnier than diesel, it strips away the lubrication the fuel system rests on, and any pump running on that mix is wearing itself.
Taken together, they show what shape the issue takes. The damage is done by circulation, not by contact. Where that petrol is only inside your tank, it is an issue of fuel, nothing more. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to the injectors downstream.
How bad is petrol in a diesel? Four scenarios we see in Hayes Park
Fuelled but not once started — as good as it gets. Being on a forecourt is what makes this possible: elsewhere, the car has been driven there to begin with. With the petrol kept inside your tank alone, it is emptied and flushed right where it stands, and nothing more is needed.
Ignition on, or started for a second. Once primed, the system has pulled petrol out of the tank up to the fuel filter and the lines. Usually nothing more than emptying, purging and seeing to your filter, and so still straightforward.
Those few miles on the road were the pump running on fuel thinned by petrol the whole way. How hard your car was driven matters as much as how far, and the work takes in that tank, the fuel lines, the filter and fresh fuel through the whole circuit. On the school run to Midsomer Norton Primary School, the distance is short. Very different once more: a trip to Bath, under 10 miles away, or some miles on the M32, under 15 miles from Hayes Park, where your engine kept working hard.
Rattling, a lumpy idle, smoke, a throttle gone soft: driven until it complained. The fuel isn't acting like diesel any more, and the engine is saying so. Leave it wherever it stops: a lay-by, a side street, the verge on Hayes Park Road. The drain and flush-through still come first, and they deal with it: if a vehicle is pulled over quickly, permanent damage is very uncommon.
Petrol in a diesel myths Hayes Park drivers hear
"Top it up the rest of the way with diesel and it will be fine" — a myth. It will not. A fuller tank of the same mix is all you get, because topping up takes out nothing. A diesel fuel system does not tolerate petrol by percentage in the way that guidance presumes.
Not so: a modern diesel copes with a bit of petrol. If anything, the opposite. At higher pressure, through finer parts: that's how a modern diesel moves its fuel, and so the lubrication matters 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 generally won't run, and so the motorist stops — and the damage stops with them. While your pump grinds, a diesel fed petrol usually starts, idles and drives away as though nothing has happened. Running is not the same as fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct fault. What petrol has diluted remains thinned, and that petrol remains inside the tank regardless.
Myth: "Drain your tank yourself and you're sorted." After the engine has been run, some of that petrol is no longer inside your tank: it's in the filter and the fuel lines, and it goes right back through your pump at your next start. Besides, petrol drained into a can by the road is genuinely hazardous.
Why petrol in a diesel occurs so easily
It is rarely carelessness, and nobody does it on purpose. One way only, since of the nozzles: the narrower petrol one slips inside a diesel filler with almost no resistance, while the diesel one mostly will not fit a petrol car. That's how the forecourt makes it straightforward.
When routine and your car stop matching, it happens. A new car, a hire car or a courtesy car. Households running one of each, petrol and diesel. The pumps in a different order on a familiar forecourt. A train to catch, and a rushed fill on the way to Oldfield Park. The first fill-up in a diesel Volkswagen Passat after years of driving petrol is precisely the moment it takes place. Throw in a back seat full of children, a phone call or rain, and the hand takes over.
Hayes Park drivers: how to prevent petrol in a diesel next time
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most generally do. Check the petrol pump's label; the colour is just a clue.
- In a car you don't know, look inside the flap over your filler or at the cap before your first fill: plenty of motors state the fuel type there.
- A coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember, for a home with one of each.
- Before the nozzle leaves the pump the first time you fuel a hired or new car, say "diesel" aloud. Daft, perhaps, yet it works.
- Thinking about something else is when this becomes an easy mistake to make, so put your phone away then keep your mind on the petrol pump.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler built to reject a petrol nozzle, and add-on devices exist for vehicles without one. They are a backstop, not a reason to stop checking the pump.
- As soon as you notice, stop: less petrol inside your tank means a thinner mix. What to do next doesn't change, though — still do not crank it.
Petrol already in a diesel in Hayes Park? Start here
Short and simple, then, is the order of things. Leave it unstarted, with the ignition switched off as well. The staff on the forecourt — whether at Esso itself or wherever you filled up — will normally help push it clear of the petrol pump if you ask. Then call 0333 366 0103 and tell us what got in, about how much, and if it has run.
Say so if it was AdBlue rather than petrol: it's a different problem, with its own page for Hayes Park, since AdBlue brings corrosion and deposits rather than lost lubrication.
One petrol in a diesel task around Hayes Park costs more than another. Why?
There is no fair single quote for this, because the four situations above are four different jobs. The scenario itself does most of the work of moving the cost. After that it is the proportion — how much petrol went in against how much that tank takes — and then where the vehicle is and whether a technician can reach it safely.
That is why our technicians ask three questions before pricing rather than after: what was put in, how much, and if it's run. A range turns into a straight figure when those replies are in.
About Hayes Park, briefly
Hayes Park is a suburban area in Somerset, situated near the River Avon and close to the city of Bath. Hayes Park sits at an elevation of around 95 metres, with detached housing being the predominant type of accommodation in the area. Hayes Park is located near several other places, including Midsomer Norton, Greenhill, and Providence Place, and is around 8.5 miles from Bath. Hayes Park has a population of approximately 5666 residents.
Fuel drain cover across Somerset, Hayes Park included
Hayes Park sits in the BA postcode area, and the teams that answer petrol in diesel call-outs there work the places around it as well — Midsomer Norton, Greenhill and Providence Place among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all places we work, and the vehicle does not need to move to us.
Still at the petrol pump in Hayes Park?
The best place there is, then — that is where you are. Turned off it remains; then phone.