Should You Worry? Petrol in a Diesel Car in Yeadon
If it has not been started, you can worry far less than you probably are. Petrol resting in a diesel tank does nothing to the engine until something draws it through your fuel system — the ignition priming the pump, the starter, or the drive on its own. So the fair answer to the first question anyone around Yeadon asks, "have I wrecked it?", is generally no. Leave the engine off and ring Petrol in Diesel — that is how you keep it that way. Further down, you will find what petrol really does inside a diesel, how far it might have gone, and how to stop it happening to you a second time.
Inside your engine: what petrol in a diesel does
Two jobs fall to diesel on its journey round a motor. Before it burns, it protects — then it ignites. The high-pressure pump and the fuel injectors are designed to very fine clearances, and your diesel passing through them is what keeps those surfaces from grinding against each other.
Of those two jobs, petrol manages the first poorly and the second not at all. The knocking comes from petrol being designed not to ignite when compressed, which is exactly the opposite of what a diesel needs. On top of that it is runnier than diesel, it strips away the lubrication your system hinges on, and any pump working on that blend is wearing itself.
Put these together and the shape of the issue is clear. The damage is done by circulation, not by contact. All a tank with petrol in it amounts to is a fuel issue. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds travels on with the fuel to the injectors further on.
Yeadon, petrol in a diesel: four cases, from mild to serious
Filled up, not once started. The best case there can be. On a forecourt, and really only there, the petrol is still limited to your tank — since anywhere else your car was driven to reach it. The task is draining and rinsing on the spot.
A moment's running, or merely your ignition on. Petrol has come out of that tank and got to your filter and the lines, because the system has been bled. Drain, flush, deal with your filter: still usually straightforward.
Driven a few miles. Now your pump has spent these miles working on diluted fuel. How hard your car was driven matters as much as how far, and this work takes in your tank, the fuel lines, the fuel filter and fresh fuel through the entire circuit. On the school run to Rufford Park Primary School, the mileage is short. Any distance on the Inner Ring Road, under 10 miles from Yeadon, means the motor working hard throughout, and a run to Bradford, under 10 miles away, is a very different job as well.
It complained, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone uneven. The fuel isn't acting like diesel any more, and your motor is saying so. Stop on the spot — on the verge on Town Hall Square, at the kerb, down a side road — and don't move it again. A vehicle stopped early very rarely has lasting damage, as the fuel drain and the flush-through, which still come first, take care of it.
Petrol in a diesel myths Yeadon people hear
Myth: topping up to full with diesel makes it fine. It doesn't. Nothing is removed when you top up — that tank simply holds more of the same blend. A diesel fuel system doesn't accept petrol by percentage in the way that advice supposes.
If anything, the opposite is true. Myth: "A newer diesel can cope with a bit of petrol." Protection counts more on current diesels, not less, because their fuel runs through finer components at higher pressure.
Myth: "If it starts and drives, there's no damage done." This is the one that catches drivers. Diesel in a petrol motor usually means a motor that won't run: the motorist stops, and so does the damage. A diesel fed petrol generally starts, ticks over and drives away as if nothing has happened, while your pump grinds. Running doesn't mean fine.
Myth: "Add some two-stroke oil and drive it home." It is an outdated fix for a different fault. That petrol is still inside that tank after that, and what it has thinned is not put back.
"Drain it yourself and you are sorted" — a myth, since after it has been running some petrol lies in the filter and lines, ready to go right back through your pump at the next start. Also, a can of petrol drained at the roadside is genuinely risky.
Why petrol in a diesel occurs so easily
A careless moment is rarely the cause, and no one means to do it. A diesel nozzle generally won't fit a petrol vehicle, but the smaller petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one mistake simple, and only in one direction.
When habit and the vehicle stop matching, it takes place. Hire cars, courtesy cars, and vehicles that are new to you. A household with one petrol and one diesel on the driveway. A well-known forecourt with the pumps in a different order. Filling up in a hurry en route to Guiseley, with a train to catch. A new-to-you diesel Volkswagen Golf, its first fuelling, and a driver accustomed to petrol: precisely when it happens. Add rain, a phone call or a back seat full of kids, and your hand repeats what it has always done.
Yeadon motorists: how to prevent petrol in a diesel next time
- Green for unleaded and black for diesel is usual in the UK — but not on every forecourt. Go by the label on the petrol pump, not the colour.
- Check your filler flap. Plenty of cars state the fuel inside the flap or on the cap. Look at it on the first fill in any car you don't know.
- Label your key. In a home with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of intending to remember.
- It sounds daft and it does the trick: on your first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the pump.
- While you're thinking about something else, this is an easy mistake to make — so tuck your phone away.
- 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 cars without one. They are a safety net, not a reason to stop checking the petrol pump.
- Spotting it mid-fill? Stop there and then. A weaker blend follows from less petrol inside that tank, but your next step stays the same: don't crank it.
Yeadon: already put petrol in a diesel?
Then the order of things is brief. Starting it is out, and so is switching on your ignition. If you are still on the forecourt — Morrison's Petrol Filling Station or anywhere else — ask the staff to help you roll the vehicle away from the petrol pump. Then phone 0333 366 0103 and tell us what got in, about how much, and whether it's run.
If it was AdBlue rather than petrol, say so. That is a different fault — corrosion and deposits instead of lost protection — and it has its own page for Yeadon.
What makes one Yeadon petrol in a diesel job cost more than the next
An honest single price doesn't exist here: four situations, four separate jobs. Mostly, your cost moves with which one you're in. Where the car is matters too, and whether a technician can safely get to it, after the ratio of petrol to what that tank holds.
That is why our engineers ask three queries before pricing instead of after: what was put in, how much, and if it's run. Those answers turn a range into a straight figure.
About Yeadon
Yeadon is a town in West Yorkshire, situated near several lakes and reservoirs, including those in Rufford Park, at an elevation of around 179 metres. Yeadon lies approximately 5.9 miles northwest of Bradford and is characterised by its semi-detached housing stock. Yeadon has a population of around 18,010 people and is close to nearby places such as Shaw Lane and Nether Yeadon.
Yeadon and West Yorkshire: where our fuel drain cover reaches
The vans answering petrol in diesel call-outs around Yeadon, in the LS postcode area, also work the locations around it, Shaw Lane, Rufford Park and Nether Yeadon among them. You need not move the car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations where we work.
Still at the petrol pump in Yeadon?
Then, you could not be in a better position. Keep it off. Phone.