How Worried Should You Be? Petrol in a Diesel Car in Laneshaw Bridge
Far less than you probably are, if it hasn't been started. Petrol sitting in a diesel tank does nothing to the engine till something pulls it through the system — your ignition priming your pump, your starter, or driving on its own. So the fair answer to the first question anyone in Laneshaw Bridge asks, "have I wrecked it?", is generally no. Keep it like that: leave the engine off then call Petrol in Diesel. What petrol actually does to a diesel, how to judge how far it has gone, and how to stop it from happening a second time: that is the rest of this page.
Petrol in a diesel: what does it do to the engine?
Diesel does two jobs on its way through a motor. Lubricating comes before burning; it does both. The high-pressure fuel pump and the injectors are built to very fine clearances, and the diesel passing through them is what keeps those surfaces from grinding against one another.
Petrol does the first task poorly and the second not at all. It's thinner than diesel and takes away the lubrication your fuel system hinges on, and so a pump running on a petrol mix is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That is where the rattling comes from.
Put these together and the shape of the problem is plain. The harm is done by circulation, not by contact. Where the petrol is only inside your tank, it's a fault of fuel, nothing more. After your pump has been running on that petrol, a mechanical problem has started: anything shed by a pump that is wearing down is carried downstream to the injectors with your fuel.
Laneshaw Bridge, petrol in a diesel: four situations, from mild to significant
Filled up, and not started: nothing beats it. At a forecourt, and truly only there, the petrol is still confined to your tank — since anywhere else the vehicle was driven to reach it. The task is emptying and flushing on the spot.
Your ignition switched on, or a brief start. The fuel system has been primed, and so petrol has left the tank and got to the fuel filter and the lines. Still generally easy: drain, flush, and the filter dealt with.
Those few miles on the road were your pump running on fuel diluted by petrol throughout. The work is that tank, your lines, the fuel filter and clean fuel through the entire circuit, and how hard your car was driven counts as much as how far. Short trips, like the school run to Laneshaw Bridge Primary, are one thing. Any mileage on the M65, under 5 miles from Laneshaw Bridge, means the engine has worked hard throughout, and a run to Bradford, under 25 miles away, makes a very different task too.
Driven till it protested. Clattering, a ragged idle, smoke, a throttle that has gone soft. What you are hearing is your engine reporting fuel that no longer behaves like diesel. Pull up where you are — on the verge on Valley Mill Court, at the kerb, down a side road — and don't move it again. The fuel drain and flush-through still come first, and they sort it out: when a vehicle is stopped quickly, permanent damage is very unusual.
What Laneshaw Bridge drivers get told about petrol in a diesel — and the stories in it
Myth: topping up to full with diesel makes it fine. It does not. Nothing is removed by topping up — you are left with a bigger tank, still the same mix. The assumption behind the advice — that diesel fuel systems tolerate petrol by percentage — is wrong.
Myth: "A current diesel can cope with a bit of petrol." If anything, the opposite. At higher pressure, through smaller parts: that is how a newer diesel handles its fuel, and so the lubrication matters for more, not less.
The myth that catches motorists out: if it starts and drives, it must be unharmed. Feed diesel to a petrol engine and it usually won't run, and so the driver stops — and the damage stops with them. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually does; meanwhile the pump grinds. A running engine doesn't mean fine.
An outdated fix for a different fault is behind this one. Myth: "Add some two-stroke oil and drive the car home." None of what petrol weakened is put back by it — and later, that tank still contains the petrol.
Myth: "Drain your tank yourself and you're sorted." After the motor has been run, some of the petrol is no longer in that tank: it is in the fuel filter and your lines, and it goes straight back through your pump at your next start. And, a can of petrol drained by the roadside is genuinely dangerous.
Petrol in a diesel: how does it occur?
A careless moment is seldom the cause, and nobody means to do it. The forecourt makes it simple: the petrol nozzle is the smaller of the two, and it slips into a diesel filler with almost no resistance, whilst a diesel nozzle mostly won't go into a petrol vehicle at all. So the slip runs one way.
The moment habit stops matching the car is the moment it occurs. A motor that is new to you — hired, on loan as a courtesy car, or just bought. Two cars on one driveway, one petrol, one diesel. The pumps in a different order on a well-known forecourt. A rushed fill on the way to Colne with a train to catch. A new-to-you diesel Volkswagen Passat, its first fuelling, and a driver accustomed to petrol: precisely when it takes place. With rain, a call arriving, or a car full of children to deal with, the hand simply does what it always has.
Next time you fill up in Laneshaw Bridge: preventing petrol in a diesel
- 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.
- Plenty of vehicles state the fuel type inside your filler flap or on the cap, and so check there on your first fill in any vehicle you do not know.
- One of each in the home? Label the key to your diesel — a bright fob, a sticker — since intending to remember is not enough.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the pump. It sounds silly and it does the trick.
- Whilst you're thinking about something else, this is an easy mistake to make — so put your phone away.
- Add-on devices exist for vehicles without one, and some diesels come with a filler that will not take a petrol nozzle. Useful — but a backstop only, never a reason to stop checking the label.
- Stop the moment you notice. Less petrol inside the tank makes a thinner blend. It doesn't change what to do next, which is still not to fire it up.
Put petrol in a diesel in Laneshaw Bridge already?
Short and simple, then, is the order of things. Leave it unstarted, with your ignition off as well. The staff on the forecourt — whether at Sainsbury's itself or wherever you filled up — will normally help push it clear of the pump if you ask. Then call 0333 366 0103 and tell us what was put in, roughly how much, and if it's run.
Say so if it was AdBlue rather than petrol: it's a different problem, with its own page for Laneshaw Bridge, because AdBlue brings corrosion and deposits instead of lost protection.
What makes one Laneshaw Bridge petrol in a diesel job cost more than the next
Four different jobs lie behind the four scenarios above — which is why there's no honest single quote. Mostly, the cost shifts with which situation you're in. Two things come after that: the petrol that was put in as a share of what your tank holds, then the place your car is in and whether a van can reach it safely.
Ahead of any quote, not after, we ask three questions: the fuel that went in, its quantity, and whether it's run. That's why. A range turns into a straight figure when the replies are in.
About Laneshaw Bridge itself
Laneshaw Bridge is a suburban area in Lancashire, situated on the riverside at an elevation of 185 metres. Laneshaw Bridge is located near several small villages, including Monkroyd, Wycoller, and Cotton Tree, and is approximately 15.7 miles from Bradford. Laneshaw Bridge has a population of around 924 people, predominantly living in terraced housing. Laneshaw Bridge is also relatively distant from London, at a distance of 182.8 miles.
Fuel drain cover across Lancashire, Laneshaw Bridge included
Laneshaw Bridge rests in the BB postcode area, and the vans that answer petrol in diesel calls there work the locations around it as well — Monkroyd, Wycoller and Cotton Tree among them. No need to move your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all locations we drain.
Laneshaw Bridge: still at the pump?
Then, you couldn't be in a better place. Phone, and keep it switched off.