Meaford: Petrol in a Diesel Car? How Worried to Be
Provided it hasn't been started, you can worry less than you likely are. Petrol sitting in a diesel tank does nothing to the motor until something pulls it through your fuel system — your ignition priming the pump, your starter, or the drive itself. So the truthful answer to the first question anyone in Meaford asks, "have I wrecked it?", is normally no. Leave the motor off and ring Petrol in Diesel — that keeps it that way. Below, you will find what petrol actually does inside a diesel, how far it may have got, and how to stop it happening to you a second time.
Petrol in a diesel: what does it do to your engine?
Diesel has two jobs on its way through an engine. Oiling comes before burning; it does both. What keeps the surfaces inside the high-pressure pump and your injectors from grinding against one another is your diesel flowing through them — they're built to extremely fine clearances.
Poorly at the first, not at all at the second: that's petrol. The knocking 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 thinner than diesel, it strips away the lubrication the fuel system hinges on, and any pump working on that mixture is wearing itself.
Combined, those make the shape of the trouble plain. Not contact but circulation is what does the harm. All a tank with petrol in it amounts to is a fuel problem. A pump that has been working on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with the fuel to the fuel injectors downstream.
Petrol in a diesel in Meaford: how bad is it? Four cases
Filled up, and never started: no case is better. Being at a forecourt is what makes this the case: elsewhere, the vehicle has been driven there to begin with. With that petrol kept inside your tank alone, it is cleared and cleaned right where it stands, and nothing more is needed.
Your ignition turned on, or a short start. With your system primed, the lines and filter now hold petrol that came from the tank. Drain, flush, deal with your filter: still normally simple.
Some miles driven, and your pump has spent every one of them labouring on weakened fuel. Mileage is only half of that; how hard it was driven matters just as much. Either way this work includes that tank, the fuel lines, your filter and clean fuel through the entire circuit. The school run to Christ Church CofE First School is one matter. A run as far as Stoke-on-Trent, under 10 miles away, is a very different task. So is any miles on the M6, under 3 miles from Meaford, where the engine has been running hard the whole time.
It protested, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone uneven. The motor is telling you the fuel is no longer acting like diesel. Pull up wherever you are — the verge on Stone Road, a lay-by, a side street — then leave the vehicle where it is. Lasting damage is very rare if a car is stopped early, and the drain and flush-through that still come first deal with it.
Myths Meaford motorists hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Topping up takes out nothing; it gives you a fuller tank of the same mixture. The assumption behind that advice — that diesel fuel systems tolerate petrol by percentage — is wrong.
Myth: a newer diesel copes with a bit of petrol. Rather, the reverse. At higher pressure, through finer components: that's how a newer diesel handles its fuel, so the protection counts for more, not less.
This is the one that fools drivers. Myth: "If it starts and drives, there is no harm done." Any petrol engine fed diesel usually will not run, and so the driver stops and the harm stops with them. Feed petrol to a diesel and it normally starts, idles and drives away like nothing happened — all while its pump is wearing. Running is not the same as fine.
Not so: a two-stroke additive makes it safe to drive home. It was an old fix, meant for another problem. What petrol has thinned stays thinned, and the petrol remains inside the tank regardless.
The next start sends petrol back round the pump out of the fuel lines and the filter, where some of that ends up after the motor has run. That's why a DIY tank drain does not leave you sorted — a myth. Besides, petrol emptied into a can by the road is genuinely risky.
Why petrol in a diesel takes place so easily
No one does it on purpose, and it's rarely carelessness. The petrol nozzle is the slimmer of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly won't go into a petrol motor at all. The forecourt makes it simple, and the slip runs one way.
The moment routine stops matching the car is the moment it occurs. Any car that's new to you — a hire car, on loan as a courtesy car, or brand new. One petrol and one diesel on the drive of the same household. The pumps in a different order on a well-known forecourt. A rushed fill on the way to Stone with a train to catch. Years of petrol cars behind you, a diesel Skoda Octavia in front of you at the forecourt for its first tank — that is when. With rain, a call arriving, or children to deal with, your hand simply does what it always has.
Avoiding petrol in a diesel next time you fill up in Meaford
- Read the pump, not the colour. In the UK unleaded handles are usually green and diesel black, yet not on every forecourt. The label is what counts.
- Many motors state the fuel type inside the filler flap or on the cap, so check there on the first fill in any vehicle you don't know.
- Good intentions do less than a sticker or a fob in a vivid colour on your diesel's key if a house has one of each. So label it.
- Before the nozzle leaves the pump the first time you fuel a hired or new car, say "diesel" out loud. Daft, perhaps, yet it works.
- Put your phone away. This is an easy mistake to make whilst you're thinking about something else.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to block a petrol nozzle, and add-on devices exist for cars without one. They are a backstop, not a reason to stop checking the pump.
- Stop as soon as you realise. Less petrol inside the tank makes a weaker blend. It doesn't change what to do next, which is still not to fire it up.
Already put petrol in a diesel around Meaford?
In that case, there is just a short order of things. Don't switch the ignition on, and do not fire it up. If you're still on the forecourt — BP or anywhere else — ask the staff to help you push the vehicle away from the petrol pump. Call 0333 366 0103 next, with three answers — the fuel, the approximate volume, and if it has run.
Corrosion and deposits are the problem with AdBlue, whereas petrol brings lost lubrication. So if it was AdBlue, say so — and read its own Meaford page.
Meaford petrol in a diesel tasks: why one costs more than another
Four separate jobs lie behind the four situations above — which is why there's no honest single quote. What moves your cost is mostly which of them you're in. Beyond that it is the share — how much petrol was put in against how much that tank takes — and then where your car is and whether a van can reach it safely.
What went in, how much, and whether it has run — three questions our technicians ask before costing, not after, for precisely that reason. Given the replies, there is a straight figure instead of a range.
About Meaford and its setting
Meaford is a small village in Staffordshire, situated on the riverside at an elevation of 93 metres, with detached housing being the predominant type of accommodation. Meaford lies near several other small communities, including Burybank, Stonefield, and Oulton Grange, and is approximately 7.3 miles from Stoke-on-Trent. Meaford has a population of around 568 people, making it a quiet and relatively small residential area. Meaford is also located at a distance of 130.2 miles from London, in the West Midlands region.
Across Staffordshire and around Meaford: fuel drain cover
Petrol in diesel calls around Meaford — part of the ST postcode area — go to vans that likewise cover the spots about it, Burybank, Stonefield and Oulton Grange among them. The vehicle doesn't need to come to us: our engineers drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
Still at the petrol pump around Meaford?
Nothing beats it: that's where you now are. Keep the vehicle turned off, and ring.