How Worried Should You Be? Petrol in a Diesel Car in Westcliff
Not started? Then less anxious than you probably are. Everyone in Westcliff starts with "have I ruined it?", and the fair answer is normally no: petrol resting inside the tank of any diesel remains harmless till priming, cranking or driving pulls it into the system. Petrol in Diesel is who to phone, with your motor kept off, so it stays that way. The remainder of this page sets out what petrol actually does to a diesel, how to judge how far it has got, and how to make sure it doesn't happen to you a second time.
Petrol in a diesel: what does it do to the engine?
On its way through a motor, diesel does two tasks. Before it combusts, it protects — then it ignites. What keeps the surfaces inside the high-pressure fuel pump and the fuel injectors from wearing down against one another is your diesel flowing through them — they are made to very fine clearances.
The second job petrol does not do at all, and the first it does poorly. 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 away the lubrication the fuel system rests on, and any pump running on that mixture is wearing itself.
Put those together and the shape of the trouble is plain. It's movement that does the damage, not contact. Where that petrol is only inside your tank, it's an issue of fuel, nothing more. After your pump has been working on that petrol, a mechanical issue has started: anything shed by a pump that's wearing down is carried onward to the fuel injectors with your fuel.
Petrol in a diesel around Westcliff: how bad is it? Four cases
Filled up, and never started: no case is better. On a forecourt, and really only there, the petrol is still confined to the tank — because anywhere else the vehicle was driven to reach it. The job is emptying and cleaning on the spot.
Your ignition switched on, or a brief start. Petrol has come out of your tank and reached your filter and the fuel lines, because the fuel system has been bled. That's generally still a simple job — a drain, a flush, and the filter seen to.
Your pump now spent a few miles on weakened fuel — that's what driving the vehicle meant. Tank, lines, filter, then fresh fuel put through the whole system: that is this work, and the way your car was driven matters as much as the mileage. A school run to Oasis Academy Parkwood is one matter. A run as far as Kingston upon Hull, under 25 miles away, is a very different task. So is any miles on the A1077(M), under 3 miles from Westcliff, where the motor has been labouring hard throughout.
Clattering, a lumpy idle, smoke, a throttle gone soft: driven till it complained. The fuel is not behaving like diesel any more, and the motor is saying so. Stop wherever you are — the verge on West Common Lane, a lay-by, a side street — then leave the vehicle where it is. A car pulled over early very rarely has permanent damage, because the drain and the flush-through, which still go first, sort it out.
What Westcliff motorists get told about petrol in a diesel — and the stories in it
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. A bigger tank of the same mix is all you get, since topping up removes nothing. The idea behind that guidance — that diesel fuel systems tolerate petrol by percentage — is wrong.
"Newer diesels can handle a little petrol" — a myth, and closer to the reverse. More precise components and higher pressure are how a current diesel runs its fuel, and that makes the protection matter more, not less.
"It starts, it drives, so there is no harm" — the myth that catches more motorists than any other. Any petrol engine fed diesel usually won't run, so the driver stops and the damage stops with them. Feed petrol to a diesel and it generally starts, ticks over and drives away like nothing happened — all the while its pump wears. Running isn't the same as fine.
An old workaround for a distinct issue lies behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." The petrol is still inside your tank after that, and what it has thinned isn't put back.
The next start sends petrol back round your pump from your lines and the fuel filter, where some of it ends up after the motor has been run. That's why a DIY tank drain does not sort it — a myth. Besides, petrol drained into a can by the road is genuinely dangerous.
How it happens: petrol in a diesel
On purpose? Never. Through carelessness? Seldom, if ever. The forecourt makes it simple: the petrol nozzle is the narrower of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle mostly won't go into a petrol vehicle at all. So the mistake runs one way.
When routine and the vehicle stop matching, it takes place. A new car, a hire car or a courtesy car. A household with one petrol and one diesel on the driveway. Your ordinary forecourt, its pumps now in a different order. A rushed fill en route to Scunthorpe with a train to catch. Years of petrol cars behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that is when. Add rain, a phone call or a back seat full of kids, and your hand does what it has always done.
How to avoid petrol in a diesel at your next fill-up in Westcliff
- A green handle for unleaded and black for diesel is usual in the UK — but not on every forecourt. Trust the label on the pump, not the colour.
- Check your filler flap. Many motors state the fuel type inside the flap or on the cap. Look at it on the first fill in a motor you don't know.
- Label the key. In a house with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of intending to remember.
- Before the nozzle comes off the petrol pump the first time you fuel a hired or new motor, say "diesel" aloud. Silly, yes, yet it does the trick.
- While you are thinking about something else, this is an easy mistake to make — so put the phone away.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler built to reject a petrol nozzle, and aftermarket devices are available for the rest. Treat it as a safety net, and keep reading the pump.
- The moment you notice, stop: less petrol inside your tank makes a thinner blend. What to do next does not change, though — still don't start the car.
Petrol already in a diesel around Westcliff? Start here
In that case, there is only a short order of things. Leave it unstarted, with your ignition switched off too. Yet at the forecourt, at Asda or anywhere else? Ask the attendants to help you push it clear of the pump. Ring 0333 366 0103 next, with three facts — your fuel, the approximate amount, and if it has run.
Say so if it was AdBlue rather than petrol: it's a different issue, with its own page for Westcliff, since AdBlue brings corrosion and deposits instead of lost protection.
What makes one Westcliff petrol in a diesel job cost more than the next
Four different tasks lie behind the four scenarios above — which is why there's no honest single quote. Mostly, your cost shifts with which one you're in. The share counts next, meaning how much of the tank is petrol, and then the position of the car and whether getting to it is safe for a van.
Before any quote, not after, come three questions: your fuel that got in, its amount, and if it has run. That's why. Those replies are what turn a range into one firm number.
About Westcliff itself
Westcliff is a suburban area in northern Lincolnshire, situated near the towns of Old Brumby and Scunthorpe, and approximately 18 miles from Kingston upon Hull. Westcliff sits in a relatively low-lying area, with an elevation of around 16 metres, and is characterized by its predominantly semi-detached housing stock. Westcliff is part of a larger urban landscape that has developed around the Humber Estuary, with nearby places including Riddings and Brumby. Westcliff has a population of around 4904 people, according to recent estimates.
Fuel drain cover across Lincolnshire, Westcliff included
Petrol in diesel call-outs around Westcliff — part of the DN postcode area — go to teams that likewise cover the locations about it, Old Brumby, Riddings and Brumby among them. The car doesn't 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.
At the petrol pump around Westcliff, still?
The best position there is, then — that's where you are. Turned off it stays; then call.