How Worried Should You Be? Petrol in a Diesel Car in West End
Less than you probably are, provided it hasn't been started. "Have I wrecked it?" is the first thing everyone around West End asks, and the truthful answer is usually no, because petrol resting in a diesel tank harms nothing until it's dragged through the fuel system — by ignition priming, by your starter, or by driving. Keep it like that: leave your motor off and phone Petrol in Diesel. Read on for three things: the effect petrol has inside a diesel engine, the signs of how far it has got, and ways to make sure you don't repeat it.
Petrol in a diesel: what does it do to the engine?
Passing through an engine, diesel is doing two jobs at the same time. Before it combusts, it lubricates — and then it burns. The high-pressure pump and your injectors are built to very fine gaps, and your diesel passing through them is what keeps those surfaces from grinding against each other.
Poorly at the first, not at all at the second: that's petrol. Being less viscous than diesel, petrol strips out the protection a fuel system needs, leaving a pump on that mixture wearing itself. It is also made to resist igniting under compression — the reverse of what a diesel needs — which is where you get the clattering.
Together, those leave the shape of the problem plain. Contact does not do the harm — circulation does. Petrol in the tank is a fuel fault. After the pump has been working on that petrol, a mechanical problem has begun: whatever is shed by a pump that's wearing down is carried onward to the injectors with the fuel.
West End, petrol in a diesel: four situations, from mild to serious
Filled up, not once started. The best case there is. At a forecourt, and genuinely only there, that petrol is still confined to the tank — since everywhere else your car was driven to get to it. The task is draining and flushing on the spot.
Started for a second, or just the ignition on. Petrol has come out of the tank and reached the filter and the fuel lines, because the system has been primed. Drain, flush, deal with the filter: still normally straightforward.
Some miles driven, and your pump has spent every one of them labouring on diluted fuel. The work is the tank, the fuel lines, the filter and clean fuel through the entire circuit, and how hard the vehicle was driven counts as much as how far. Driving the kids to Castle Primary School is one kind of trip. Very different a second time: a trip to Wells, under 25 miles away, or any miles on the M5, under 15 miles from West End, where your engine kept working hard.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone ragged. The engine is telling you the fuel is no longer behaving like diesel. Leave it wherever it stops: a lay-by, a quiet street, the verge on Morley Road. Lasting damage is very unusual when a car is pulled over soon, and the fuel drain and flush-through that still come first sort it out.
West End motorists and the petrol in a diesel myths they hear
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Nothing is removed when you top up — that tank just carries more of the same blend. The assumption behind the advice — that diesel fuel systems accept petrol by percentage — is wrong.
Myth: "A current diesel can cope with a bit of petrol." If anything, the reverse. At higher pressure, through more precise components: that's how a newer diesel handles its fuel, and so the lubrication counts more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that catches drivers. The motorist of a petrol motor fed diesel usually stops, since it will not run, and the harm stops with them. Feed petrol to a diesel and it generally fires up, ticks over and drives away as if nothing has happened — all while its pump is wearing. Being able to run is not the same as being fine.
Myth: a two-stroke additive makes it safe to drive home. It was an old fix, supposed for another issue. None of what petrol thinned is put back by it — and later, your tank still holds that petrol.
The next start draws petrol back round the pump from the lines and the filter, where some of it ends up once your engine has run. That is why a DIY tank drain doesn't leave you sorted — a myth. It's also really risky to drain petrol into a can at the roadside.
Why petrol in a diesel happens so easily
On purpose? Never. Through carelessness? Rarely, if ever. A diesel nozzle generally won't fit a petrol motor, but the narrower petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error straightforward, and just in one direction.
When habit and the vehicle stop matching, it takes place. Hire cars, courtesy cars, and cars that are new to you. Two cars on one driveway, one petrol, one diesel. A familiar forecourt with the pumps in a different order. A train to catch, and a hurried fill en route to Crewkerne. Exactly the moment it occurs: after years of driving petrol, a driver fills a diesel Volkswagen Golf for the first time. With rain, a call arriving, or a car full of children to deal with, your hand simply does what it always has.
Next time you fill up around West End: avoiding petrol in a diesel
- The label is what matters, so check the pump instead of the colour: in the UK unleaded handles are normally green and diesel black, but not on every forecourt.
- In a car you do not know, look inside the flap over the filler or at the cap before your first fill: many vehicles print 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 household with one of each.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump. It sounds daft and it works.
- Thinking about something else is when this becomes an easy mistake to make, and so put the phone away and keep your mind on the petrol pump.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler designed to reject a petrol nozzle, and add-on devices exist for vehicles without one. They are a backstop, not a reason to stop reading the petrol pump.
- Less petrol means a weaker mix, and so stop the moment you notice — though remembering that your next step is unchanged. It is still not to start the car.
Already put petrol in a diesel around West End?
Short and simple, then, is the order of things. Do not switch your ignition on, and do not crank it. If you're still at the forecourt — BP or anywhere else — ask the attendants to help you roll the car away from the petrol pump. Next, 0333 366 0103. We will ask what got in, about how much, and if it's been run.
AdBlue, not petrol? Then tell us. Corrosion and deposits, not lost lubrication, make it a different issue — West End has a page just for it.
West End petrol in a diesel jobs: why one costs more than another
Four separate jobs sit behind the four scenarios above — which is why there is no honest single price. The scenario itself does most of the work of moving the cost. Where the car is matters too, and whether a van can safely reach it, after the share of petrol to what that tank takes.
Before any quote, not after, come three questions: the fuel that went in, the quantity, and if it's run. That's why. A range turns into a straight figure when the answers are in.
About West End
West End is a small suburban area in inland Somerset, situated near the villages of Stoke sub Hamdon, West Stoke, and Norton sub Hamdon. West End lies at an elevation of around 52 metres, approximately 18.5 miles from the city of Wells and 120.2 miles west of London. West End is characterized by its predominantly semi-detached housing stock, reflecting the typical residential development patterns of the region.
West End and Somerset: where our fuel drain cover reaches
West End sits in the TA postcode area, and the vans that answer petrol in diesel call-outs there work the places around it as well — Stoke sub Hamdon, West Stoke and Norton sub Hamdon among them. The car does not need to move to us: we drain on a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
At the petrol pump in West End, right now?
Nothing beats it: that's where you now are. Keep it off. Call.