West Gomeldon: Petrol in a Diesel Car? How Worried to Be
Probably less than you are now — as long as no one has started the car. Everyone in West Gomeldon begins with "have I wrecked it?", and the fair answer is normally no: petrol left in your tank of a diesel remains harmless until priming, cranking or driving draws it into your fuel system. Leave your engine off then phone Petrol in Diesel — that keeps it like that. Below, 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 a second time.
Inside the engine: what petrol in a diesel really does
Diesel has two jobs on its way through an engine. It burns, and before it ignites it lubricates. Extremely fine tolerances go into the injectors and your high-pressure pump, and only your diesel flowing through keeps those surfaces from grinding together.
Petrol does the first task poorly and the second not at all. A pump working on a petrol blend is wearing itself out, because petrol is runnier than diesel and takes away the protection the fuel system depends on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel wants from its fuel — and that's where any knocking starts.
Put those together and the shape of the trouble is plain. Contact does not do the damage — circulation does. All a tank with petrol in it amounts to is a fuel problem. Once your pump has been working on that petrol, a mechanical problem has begun: anything shed by a pump that is wearing is carried onward to the injectors with your fuel.
How bad is petrol in a diesel? Four situations we see around West Gomeldon
Fuelled, and never started: nothing beats it. Being at a forecourt is what makes this the case: elsewhere, the car has been driven there to begin with. With the petrol kept in the tank alone, it is emptied and purged on the spot, and nothing more is needed.
Started for a second, or just your ignition on. Petrol has come out of the tank and got to your filter and the lines, because your system has been bled. Still generally easy: drain, flush, and your filter seen to.
Those few miles driven were the pump working on fuel thinned by petrol throughout. How hard your car was driven matters as much as how far, and the work takes in the tank, your lines, the filter and clean fuel through the whole circuit. The school run to Gomeldon Primary School is one thing. Any distance on the M27, under 15 miles from West Gomeldon, means your engine working hard throughout, and a run to Salisbury, under 5 miles away, makes a very different task too.
Driven until it complained. Clattering, a ragged idle, smoke, a throttle that has gone soft. That's the motor telling you its fuel has stopped acting like diesel. Whether it is the verge on Gomeldon Road, a lay-by or a side street, stop there and leave it. A car stopped soon very seldom has long-term damage, because the fuel drain and the flush, which still go first, take care of it.
Petrol in a diesel stories West Gomeldon people hear
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing is removed by topping up — you are left with a fuller tank, still the same mixture. The assumption behind the advice — that diesel fuel systems accept petrol by percentage — is wrong.
"Modern diesels can handle a little petrol" — a myth, and nearer the opposite. At higher pressure, through finer components: that is how a current diesel moves its fuel, so the protection counts for more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that catches drivers. Diesel in a petrol motor generally means a motor that will not run: the driver stops, and so does the harm. Feed petrol to a diesel and it generally starts, idles and drives away like nothing happened — all the while its pump wears. Running does not mean fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a distinct fault. What petrol has diluted remains diluted, and that petrol stays inside your tank anyway.
The next start draws petrol back round your pump from your lines and the filter, where some of it sits after your engine has been run. That's why draining the tank yourself does not leave you sorted — a myth. On top of that, petrol drained into a can by the road is genuinely dangerous.
How it happens: petrol in a diesel
Nobody does it on purpose, and it's seldom carelessness. The petrol nozzle is the slimmer of the two and slips into a diesel filler with almost no resistance; a diesel nozzle generally won't go into a petrol car at all. The forecourt makes it simple, and the slip runs one way.
It happens when routine and the car stop matching. A car that is new to you — a hire car, on loan as a courtesy car, or just bought. Households running one of each, petrol and diesel. The pumps in a different order on a well-known forecourt. Fuelling up in a rush on the way to Salisbury, with a train to catch. Precisely the moment it occurs: after years of driving petrol, someone fills a diesel Volkswagen Golf for the first time. Add rain, a phone call or a back seat full of children, and your hand does what it has always done.
Preventing petrol in a diesel next time you fill up around West Gomeldon
- Green for unleaded and black for diesel is usual in the UK — but not on every forecourt. Go by the label on the pump, not the colour.
- Check the filler flap. Many vehicles state the fuel type inside the flap or on the cap. Look at it on your first fill in any vehicle you do not know.
- One of each in the home? Mark the key to the diesel — a bright fob, a sticker — because intending to remember is not enough.
- "Diesel", aloud, before you lift the nozzle — each time a new or hired car needs its first tank. It seems silly. It does the trick.
- Thinking about something else is when this becomes an easy mistake to make, so tuck your phone away and keep your mind on the pump.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to block a petrol nozzle, and add-on devices are available for vehicles without one. They are a safety net, not a reason to stop checking the pump.
- As soon as you realise, stop: less petrol inside that tank means a thinner mix. What to do next doesn't change, though — still do not start the vehicle.
Already put petrol in a diesel around West Gomeldon?
The order of things is brief, then. Starting it is out, and so is switching on the ignition. If you are still at the forecourt — Murco or anywhere else — ask the staff to help you push the vehicle clear of the pump. What went in, about how much, and if it has run: tell us that when you phone 0333 366 0103.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost protection, make it a different issue — West Gomeldon has a page all for it.
West Gomeldon petrol in a diesel jobs: why one costs more than another
Four separate tasks sit behind the four scenarios above — which is why there's no honest single price. Chiefly, your cost moves with which situation you're in. Where your car is counts too, and whether our van can safely reach it, after the ratio of petrol to what the tank holds.
Three questions come first, before any quote, instead of after — what was put in, how much, has it run — and this is the reason. Those replies change a range into a straight figure.
About West Gomeldon and where it is
West Gomeldon is a suburban area situated on the banks of the River Avon in Wiltshire, with a mix of detached housing and open spaces. West Gomeldon lies close to the city of Salisbury, approximately 4.3 miles to the south, and is part of a larger network of nearby settlements including Gomeldon and East Gomeldon. West Gomeldon has a relatively low elevation of around 80 metres above sea level, typical of the riverside areas in this part of the country. West Gomeldon is also within commuting distance of London, about 74.5 miles to the east.
Fuel drain cover around West Gomeldon and across Wiltshire
Petrol in diesel call-outs around West Gomeldon — part of the SP postcode area — go to vans that likewise cover the places around it, Gomeldon, East Gomeldon and Winterbourne Gunner among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all locations we drain, and the vehicle does not need to come to us.
In West Gomeldon and still at the pump?
The best position there is, then — that is where you are. Switched off it stays; then phone.