How Worried Should You Be? Petrol in a Diesel Car in Appley Bridge
Probably less than you are now — as long as no one has started the car. Petrol sitting in a diesel tank does nothing to the motor till something pulls it through the system — the ignition priming your pump, the starter, or the drive itself. So the truthful answer to the first question anyone around Appley Bridge asks, "have I wrecked it?", is normally no. Keep it like that: leave your motor off then ring Petrol in Diesel. Read on for three things: the effect petrol has inside a diesel motor, the clues of how far it has spread, and the way to make sure you don't repeat it.
Petrol in a diesel: what does it do to the engine?
Diesel does two tasks on its way through an engine. It ignites, and before it burns it lubricates. What keeps the surfaces inside the high-pressure pump and the injectors from wearing against each other is the diesel flowing through them — they're built to extremely fine clearances.
Petrol does the first job poorly and the second not at all. A pump running on a petrol mixture is wearing itself out, because petrol is thinner than diesel and strips out the lubrication your fuel system relies on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel needs from its fuel — and that's where the knocking starts.
Put those together and the shape of the problem is plain. Contact does not do the harm — circulation does. Any tank with petrol in it is a fuel issue. The beginning of a mechanical one is a pump that has been working on that petrol — and whatever a worn pump sheds moves on with your fuel to the fuel injectors beyond it.
Appley Bridge, petrol in a diesel: four situations, from mild to significant
Fuelled but never started — the best it gets. The petrol is in the tank and just that tank, and the job is a drain and a flush where the car stands. This is the one scenario that can only really happen at a forecourt, because anywhere else the vehicle has been driven to get there.
Started for a second, or just the ignition on. The system has been primed, and so petrol has left that tank and reached your filter and your lines. Still generally simple: drain, flush, and your filter dealt with.
Those few miles on the road meant your pump working on fuel thinned by petrol the whole way. Miles is only half of it; how hard it was driven matters just as much. Either way this work includes your tank, your lines, the filter and clean fuel through the entire circuit. Short trips, like the school run to Appley Bridge All Saints Church of England Primary Academy, are one matter. Getting as far as Preston, under 15 miles away, makes a very different job — as does any mileage on the M6, under 3 miles from Appley Bridge, with your engine running hard all the way.
Driven on till it complained — knocking, smoke, a lumpy idle, a soft throttle. What you are hearing is the motor signalling fuel that no longer acts like diesel. Stop wherever you are — the verge on Skull House Lane, a lay-by, a side street — and leave the car there. Long-term damage is very uncommon when a vehicle is pulled over quickly, and the drain and flush that still come first deal with it.
What Appley Bridge motorists get told about petrol in a diesel — and the myths in it
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. Nothing is removed by topping up — you're left with a fuller tank, still the same mix. The assumption behind the advice — that diesel fuel systems tolerate petrol by percentage — is wrong.
Myth: "A newer diesel can cope with a bit of petrol." If anything, the opposite. Smaller components and higher pressure are the way a newer diesel runs its fuel, and that makes the protection matter more, not less.
This is the one that fools drivers. Myth: "If it starts and drives, there's no damage done." The motorist of a petrol engine fed diesel normally has no choice but to stop, because it will not run, and the damage stops with them. A diesel fed petrol usually starts, ticks over and drives away as if nothing has happened, while the pump wears. A running engine doesn't mean fine.
An old workaround for a distinct issue is behind this one. Myth: "Add some two-stroke oil and drive the car home." That petrol is still inside the tank afterwards, and whatever it has thinned isn't put back.
"Drain it yourself and you are sorted" — a myth, since after it has been running some petrol sits in the filter and lines, waiting to go straight back through your pump at your next start. It's also truly dangerous to drain petrol into a can at the kerbside.
How does petrol in a diesel take place?
On purpose? Never. Through carelessness? Seldom, if ever. One way only, because of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one mostly will not fit a petrol motor. That's how the forecourt makes it easy.
When routine and the vehicle stop matching, it takes place. Hire cars, courtesy cars, and cars that are new to you. A household with one petrol and one diesel on the drive. A forecourt you know, but with its pumps arranged differently. Fuelling up in a hurry on the way to the nearest station, with a train to catch. A new-to-you diesel Renault Megane, its first fuelling, and a driver used to petrol: precisely when it happens. The hand does what it has always done when you add rain, a phone call or a back seat full of kids.
How to avoid petrol in a diesel at your next fill-up around Appley Bridge
- The label is what counts, so check the pump rather than the colour: in the UK unleaded handles are normally green and diesel black, but not on every forecourt.
- Many vehicles state the fuel inside the filler flap or on the cap, and so check it on the first fill in a car you don't know.
- Label the key. In a household 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 the first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the pump.
- Thinking about something else is when this becomes an easy mistake to make, and so put the phone away then keep your mind on the pump.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler designed to refuse a petrol nozzle, and add-on devices are available for the remainder. Count it as a safety net, then keep checking the pump.
- As soon as you notice, stop: less petrol inside the tank means a thinner blend. What to do next does not change, though — still do not crank it.
Appley Bridge: already put petrol in a diesel?
Short and simple, then, is the order of things. Do not crank it, and do not switch your ignition on. The staff at the forecourt — whether at BP itself or wherever you filled up — will normally help roll it clear of the pump if you ask. Phone 0333 366 0103 next, with three answers — your fuel, the rough volume, and if it's run.
Corrosion and deposits are the issue with AdBlue, whereas petrol means lost lubrication. So if it was AdBlue, say so — and see its own Appley Bridge page.
Why one petrol in a diesel task around Appley Bridge costs more than another
The four situations above are four different tasks, so no single price for this would be fair. Chiefly, your cost shifts with which situation you're in. Where the vehicle is matters too, and whether a technician can safely reach it, after the share of petrol to what the tank takes.
Three questions come first, before quoting, instead of after — what got in, how much, has it run — and this is the reason. Given those answers, you get a straight figure instead of a range.
About Appley Bridge
Appley Bridge is a small village in Lancashire, situated on the riverside at an elevation of 63 metres, with semi-detached housing being the predominant type. Appley Bridge lies near the villages of Shevington Vale and Holland Lees, and is approximately 12 miles from Preston. Appley Bridge is a quiet community with a small population of around 413 residents. Appley Bridge is located in the North West region of England, about 180 miles from London.
Fuel drain cover across Lancashire, Appley Bridge included
Appley Bridge rests in the WN postcode area, and the teams that answer petrol in diesel call-outs there work the locations around it as well — Shevington Vale, Robin Hood and Holland Lees among them. A forecourt, a supermarket car park, a lay-by or your own driveway are all locations our technicians drain, and your vehicle doesn't need to come to us.
Appley Bridge: still at the petrol pump?
The best place there is, then — that is where you are. Phone, and leave it turned off.