Should You Worry? Petrol in a Diesel Car in Pwll-Glas
Provided it has not been started, worry far less than you probably are. Till the ignition primes the pump, the starter turns, or your vehicle is driven, petrol in a diesel tank simply waits there and does no harm. Which makes the honest reply to the first Pwll-Glas question — "have I wrecked it?" — normally no. Leave your engine off then call Petrol in Diesel — that is how you keep it like that. The rest of this page covers what petrol really does to a diesel, how to tell how far it has got, and how to make sure it doesn't happen to you again.
Inside the motor: what petrol in a diesel really does
Two tasks fall to diesel on its journey round a motor. Before it combusts, it protects — then it ignites. What stops the surfaces inside your high-pressure pump and the injectors from wearing against each other is the diesel flowing through them — they are made to very fine clearances.
The second task petrol does not do at all, and the first it does badly. Being less viscous than diesel, petrol strips away the protection a fuel system needs, so a pump on that mixture wearing itself. It's also made to resist igniting under compression — the reverse of what a diesel needs — which is where you hear the clattering.
Put those together and the shape of the trouble is clear. Not contact but circulation is what does the harm. A tank with petrol in it is a fuel problem. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with the fuel to the injectors further on.
How serious is petrol in a diesel? Four situations our technicians see around Pwll-Glas
The best case there is: filled up, not once started. On a forecourt, and genuinely only there, the petrol is still confined to the tank — since everywhere else your car was driven to get to it. The job is draining and rinsing on the spot.
Ignition on, or started for a second. Once primed, your system has pulled petrol from that tank up to your filter and the lines. Usually little more than emptying, flushing and seeing to the fuel filter, so still simple.
Driven a couple of miles. Now your pump has spent these miles running on weakened fuel. Mileage is only half of it; how hard it was driven matters equally. Either way this work runs to that tank, the fuel lines, your filter and fresh fuel through the whole system. Driving the kids to the local primary school is one sort of trip. Driving as far as Wrexham, under 15 miles away, makes a very different task — as does any mileage on the M56, under 15 miles from Pwll-Glas, with the engine working hard the whole time.
Knocking, a ragged idle, smoke, a throttle gone soft: driven till it complained. That's your motor telling you its fuel no longer is acting like diesel. Whether it's the verge on Gwernaffield Road, a lay-by or a side road, stop there and leave it. A vehicle pulled over soon very seldom has lasting damage, since the fuel drain and the flush, which still come first, take care of it.
Myths Pwll-Glas motorists hear about petrol in a diesel
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. Nothing is removed by topping up — you are left with a fuller tank, still the same mix. That advice supposes a diesel fuel system handles petrol by percentage. It doesn't.
Myth: a modern diesel copes with a bit of petrol. If anything, the reverse. Protection counts more on modern diesels, not less, because their fuel passes through more precise components at higher pressure.
"It starts, it drives, and so there is no harm" — the myth that catches most motorists than any other. Feed diesel to a petrol motor and it generally won't run, and so the driver stops — and the damage stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually will; meanwhile the pump wears. Running isn't the same as fine.
Myth: "Add some two-stroke oil and drive it home." It is an outdated fix for a separate problem. What petrol has thinned stays weakened, and that petrol remains in the tank regardless.
"Drain it yourself and you're sorted" — a myth, because after it has been running some petrol sits in your filter and lines, waiting to go right back through your pump at your next start. Besides, petrol drained into a can by the road is genuinely risky.
Why petrol in a diesel occurs so easily
Nobody does it on purpose, and it's rarely carelessness. One way only, since of the nozzles: the smaller petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one mostly won't fit a petrol car. That is how the forecourt makes it easy.
When routine and your car 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. The pumps in a different order on a familiar forecourt. Racing for a train outside Buckley and filling up en route. Years of petrol motors behind you, a diesel Renault Megane in front of you on 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 has always done.
How to prevent petrol in a diesel at your next fill-up in Pwll-Glas
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most usually do. Read the petrol pump's label; the colour is just a clue.
- Many cars state the fuel inside the filler flap or on the cap, so check there on the first fill in a car you do not know.
- A coloured fob or a sticker on the diesel's key achieves more than any amount of meaning to remember, in a house with one of each.
- Before the nozzle comes off the pump the first time you fuel a hired or new motor, say "diesel" aloud. Daft, yes, yet it works.
- Thinking about something else is when this becomes an easy mistake to make, so put the phone away then keep your mind on the petrol pump.
- Some diesels have a filler designed to block a petrol nozzle, and devices you can add exist for motors without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop reading the pump.
- Spotting it mid-fill? Stop at once. A thinner mix follows from less petrol inside your tank, but the next stage stays the same: do not fire it up.
Already put petrol in a diesel around Pwll-Glas?
In that case, there's just a short order of things. Don't fire it up, and do not turn the ignition on. The attendants on the forecourt — whether at Applegreen itself or wherever you filled up — will normally help roll it clear of the petrol pump if you ask. Then ring 0333 366 0103 and tell us what got in, about how much, and if it has run.
Corrosion and deposits form the problem with AdBlue, whereas petrol means lost lubrication. So if it was AdBlue, say so — and see its own Pwll-Glas page.
Why one petrol in a diesel task around Pwll-Glas costs more than another
Four different tasks lie behind the four situations above — which is why there is no honest single quote. Mostly, the cost moves with which situation you're in. Where the car is counts too, and whether a technician can safely reach it, after the proportion of petrol to what your tank holds.
That's why we ask three questions before quoting rather than after: what got in, how much, and whether it's run. Given those replies, there is a straight figure rather than a range.
About Pwll-Glas
Pwll-Glas is a suburban area situated on the riverside in Flintshire, Wales, with an elevation of 113 metres. Pwll-Glas lies near the towns of Mold and Maes-y-Dre, and is approximately 10 miles from Wrexham. Pwll-Glas has a population of around 3434 people, predominantly living in semi-detached housing. Pwll-Glas is located near Ponterwyl, and is about 171 miles from London.
Across Flintshire and in Pwll-Glas: fuel drain cover
The vans answering petrol in diesel call-outs in Pwll-Glas, in the CH postcode area, equally work the spots near it, Maes-y-Dre, Mold and Ponterwyl among them. No need to bring your car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations we drain.
In Pwll-Glas and still at the petrol pump?
The best place there is, then — that is where you are. Keep it off. Phone.