Pogmoor: Petrol in a Diesel Car? How Worried to Be
Unstarted? Then less anxious than you likely feel. Petrol sitting in a diesel tank does nothing to the motor until something draws it through your fuel system — your ignition priming the pump, your starter, or driving itself. So the fair answer to the first query everyone around Pogmoor asks, "have I ruined it?", is generally no. Petrol in Diesel is who to ring, with the engine kept off, so it remains that way. The remainder of this page sets out what petrol really does to a diesel, how to judge how far it has got, and how to make sure it does not happen to you again.
Petrol in a diesel: what does it do to your engine?
On its way through a motor, diesel has two tasks. Before it ignites, it lubricates — and then it burns. Built to extremely fine gaps, the injectors and the pump rely on the diesel flowing through them to stop their surfaces wearing against one another.
Petrol handles the first task poorly and the second not at all. The clattering 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 runnier than diesel, it strips away the lubrication your system rests on, and any pump working on that mixture is wearing itself.
The shape of the issue is plain when you put those together. The damage is done by movement, not by contact. A tank with petrol in it is a fuel fault. After the pump has been running on that petrol, a mechanical problem has begun: whatever is shed by a pump that's grinding is carried onward to the fuel injectors with your fuel.
Pogmoor, petrol in a diesel: four situations, from mild to major
Filled up, and not started: no case is better. Being on a forecourt is what makes this the case: elsewhere, the car has been driven there to begin with. With that petrol held inside the tank alone, it's emptied and flushed on the spot, and nothing more is needed.
Ignition on, or started for a moment. Petrol has come out of the tank and got to the filter and the fuel lines, because your system has been primed. Drain, flush, see to the fuel filter: still normally simple.
A few miles driven, and your pump has spent each of them labouring on weakened fuel. Tank, lines, filter, then clean fuel put through the whole circuit: that's this work, and the way your car was driven counts as much as the miles. A school run to Gawber Primary School is one thing. Any distance on the M1, under a mile from Pogmoor, means the motor has worked hard throughout, and a run to Wakefield, under 10 miles away, is a very different task too.
Driven on till it protested — knocking, smoke, an uneven idle, a dead throttle. That's your motor telling you its fuel no longer is acting like diesel. Leave it where it stops: a lay-by, a side street, the verge on Pogmoor Road. Permanent damage is very rare if a car is pulled over soon, and the fuel drain and flush-through that still come first deal with it.
Pogmoor drivers and that 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 — the tank simply carries more of the same mixture. That advice assumes a diesel fuel system handles petrol by percentage. It does not.
"Modern diesels can handle a little petrol" — a myth, and closer to the reverse. At higher pressure, through smaller parts: that's how a modern diesel handles its fuel, and so the protection matters for more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that fools people. Feed diesel to a petrol motor and it normally won't run, and so the motorist stops — and the damage stops with them. While your pump grinds, a diesel fed petrol normally starts, ticks over and drives away as though nothing has happened. Running does not mean fine.
Not so: a two-stroke additive makes it safe to drive home. It was an old fix, supposed for another fault. The petrol is still in that tank afterwards, and whatever it has thinned is not put back.
"Drain it yourself and you are sorted" — a myth, since after it's been running some petrol sits in the fuel filter and lines, waiting to go straight back through your pump on the next start. Also, a can of petrol drained by the kerbside is genuinely hazardous.
Petrol in a diesel: how does it happen?
No one does it on purpose, and it's rarely carelessness. The petrol nozzle is the smaller of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol car at all. The forecourt makes it simple, and the error runs one way.
When habit and your car stop matching, it takes place. A new motor, a hire car or a courtesy car. Households running one of each, petrol and diesel. A forecourt you know, only with its pumps laid out differently. A rushed fill en route to Dodworth with a train to catch. Precisely the moment it takes place: after years of driving petrol, someone fills a diesel Volkswagen Golf for the first time. The hand repeats what it has always done once you add rain, a phone call or a back seat full of children.
Avoiding petrol in a diesel next time you fill up around Pogmoor
- Green for unleaded and black for diesel is normal in the UK — but not on each forecourt. Go by the label on the pump, not the colour.
- Many cars state the fuel inside the filler flap or on the cap, and so check there on the first fill in a vehicle you do not know.
- One of each in the household? Mark the key to the diesel — a bright fob, a sticker — because meaning to remember isn't enough.
- "Diesel", out loud, before you lift the nozzle — each time a new or hired car gets 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 the phone away then 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 exist for vehicles without one. They are a safety net, not a reason to stop checking the petrol pump.
- Stop the moment you realise. Less petrol inside the tank means a weaker mixture. It doesn't change what to do next, which is still not to crank it.
Petrol already in a diesel in Pogmoor? Begin here
The order of things is short, then. Do not start it, and don't turn the ignition on. The staff at the forecourt — whether at Jet itself or wherever you filled up — will normally help push it away from the pump if you ask. Then ring 0333 366 0103 and tell us what was put in, about how much, and if it has run.
Say so if it was AdBlue instead of petrol: it's a separate issue, with its own page for Pogmoor, since AdBlue brings corrosion and deposits instead of lost protection.
Why one petrol in a diesel task around Pogmoor costs more than another
The four scenarios above are four separate tasks, so no single quote for this would be honest. The scenario itself does most of the work of moving your cost. The share matters next, meaning how much of that tank is petrol, and then the position of the vehicle and whether reaching it is safe for a technician.
What got in, how much, and whether it has run — three queries our engineers ask before pricing, not after, for exactly that reason. Given the answers, there is a straight figure rather than a range.
About Pogmoor and where it is
Pogmoor is a suburban area in South Yorkshire, situated approximately 8.9 miles from Wakefield and 152.9 miles from London. Pogmoor lies at an elevation of around 145 metres, near the communities of Gawber, Old Town, and Wilthorpe. Pogmoor is characterised by its predominantly semi-detached housing stock, reflecting the residential development of the area. Pogmoor has a population of around 4821 residents.
Across South Yorkshire and around Pogmoor: fuel drain cover
Petrol in diesel jobs around Pogmoor — part of the S postcode area — go to vans that also cover the places round it, Gawber, Old Town and Wilthorpe among them. You need not move your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations where we work.
Still at the pump around Pogmoor?
Then, you couldn't be in a better place. Keep it off. Phone.