Should You Worry? Petrol in a Diesel Car in Cragg Hill
Not started? Then less worried than you likely feel. "Have I ruined it?" is the first thing everyone in Cragg Hill asks, and the honest answer is generally no, because petrol left in a diesel tank hurts nothing till it is dragged through the system — by ignition priming, by your starter, or by being driven. Petrol in Diesel is who to phone, with the engine left off, so it stays that way. Read on for three things: the effect petrol has inside a diesel motor, the clues of how far it has spread, and ways to make sure you never do it again.
What petrol in a diesel does to the motor
Two tasks fall to diesel on its journey round a motor. It combusts, and before it ignites it lubricates. Made to very fine gaps, the injectors and the pump rely on the diesel flowing through them to stop their surfaces wearing against one another.
The second task petrol does not do at all, and the first it does poorly. A pump running on a petrol blend is wearing itself out, because petrol is thinner than diesel and takes away the lubrication your fuel system relies on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel wants from its fuel — and that's where the rattling starts.
Taken together, they show the shape the trouble has. Contact does not do the damage — circulation does. Petrol in the tank is a fuel fault. Whatever a worn pump sheds goes on, carried by the fuel, into the fuel injectors downstream, which is why a pump that has worked on the petrol is where a mechanical issue begins.
Petrol in a diesel around Cragg Hill: how bad is it? Four cases
Filled up, not once started. The best case there can be. Only the tank has petrol in it, so the job is clearing the tank and flushing your system where your car sits. This situation can only truly happen at a forecourt: anywhere else, your car got there by being driven.
A brief spell of running, or just the ignition on. The fuel system has been bled, and so petrol has left your tank and got to your filter and your lines. Still normally easy: drain, flush, and the filter dealt with.
Those few miles on the road were your pump working on fuel thinned by petrol the whole way. Tank, lines, filter, then fresh fuel put through the whole circuit: that is this work, and the way your car was driven counts as much as the distance. Short trips, such as the school run to Horsforth Featherbank Primary School, are one matter. Very different again: a run to Leeds, under 5 miles away, or any distance on the A58(M), under 5 miles from Cragg Hill, where the motor kept working hard.
Rattling, a lumpy idle, smoke, a throttle gone soft: driven till it complained. The engine is telling you your fuel is no longer behaving like diesel. Pull up wherever you are — the verge on Wood Lane, a lay-by, a side street — and leave it there. A vehicle stopped early very rarely has permanent damage, since the drain and the flush-through, which still come first, sort it out.
Stories Cragg Hill 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'll be." Nothing comes out when you top up — your tank simply carries more of the same mixture. Percentage is not how a diesel fuel system copes with petrol, however much that guidance supposes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the reverse. A current diesel sends its fuel through smaller components at higher pressure, which makes the protection count more, not less.
"It starts, it drives, and so no harm done" — the myth that trips up more motorists than any other. A petrol motor fed diesel generally will not run, so the motorist stops and the damage stops with them. Whilst your pump wears, a diesel fed petrol usually starts, idles and drives away as if nothing has happened. Running is not the same as fine.
Myth: a two-stroke additive makes it safe to drive home. It is an old workaround, meant for another issue. It does not put back what petrol has weakened, and the petrol is still inside your tank later.
Once the motor has been run, part of the petrol sits in the fuel filter and the lines, not that tank — and your next start sends it right back through the pump. So the myth "drain your tank yourself and you are sorted" does not hold. Besides, petrol cleared into a can by the road is truly dangerous.
Why petrol in a diesel happens at all
It is rarely carelessness, and nobody does it on purpose. One way only, since of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one generally won't fit a petrol car. That's how the forecourt makes it straightforward.
Routine and your car falling out of step is how it takes place. Hire cars, courtesy cars, and cars that are new to you. Two vehicles on one driveway, one petrol, one diesel. Your usual forecourt, its pumps suddenly in a different order. A hurried fill en route to Kirkstall Forge with a train to catch. Exactly the moment it happens: after years of driving petrol, a driver fills a diesel Volkswagen Tiguan for the first time. Your hand repeats what it has always done when you add rain, a phone call or a back seat full of kids.
Next time you fill up in Cragg Hill: avoiding petrol in a diesel
- The label is what counts, so check the pump instead of the colour: in the UK unleaded handles are usually green and diesel black, yet not on every forecourt.
- The first fill in a new vehicle is the time to check your filler flap — inside it, or on the cap, many cars state which fuel to use.
- A coloured fob or a sticker on the diesel's key achieves more than any amount of intending to remember, for a house with one of each.
- Before the nozzle leaves the pump the first time you fill a hired or new vehicle, say "diesel" aloud. Daft, perhaps, but it works.
- Whilst you're thinking about something else, this is an easy mistake to make — so tuck your phone away.
- 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. Treat it as a backstop, and keep checking the pump.
- Less petrol makes a weaker mix, and so stop as soon as you notice — though remembering that the next step is unchanged. It is still not to fire it up.
Cragg Hill: already put petrol in a diesel?
Then the order of things is short. Do not turn your ignition on, and don't crank it. If you are still on the forecourt — Shell or anywhere else — ask the staff to help you roll it clear of the pump. Next, 0333 366 0103. We'll ask what went in, roughly how much, and if it's been run.
Say so if it was AdBlue instead of petrol: it's a different problem, with its own page for Cragg Hill, because AdBlue brings corrosion and deposits rather than lost protection.
One petrol in a diesel task around Cragg Hill costs more than another. Why?
Four different jobs sit behind the four scenarios above — which is why there's no fair single price. Chiefly, your cost shifts with which situation you're in. The share counts next, meaning how much of your tank is petrol, and then the position of the car and whether reaching it is safe for a van.
Ahead of any quote, not after, we ask three queries: your fuel that got in, the amount, and whether it's run. That's why. Given those replies, you get a straight figure instead of a range.
About Cragg Hill
Cragg Hill is a suburban area in West Yorkshire, situated on the riverside at an elevation of 84 metres, with semi-detached housing being the predominant type of accommodation. Cragg Hill lies approximately 4 miles from Leeds, making it a commuter-friendly location. Cragg Hill is close to nearby places such as Newlay, Whitecote, and Horsforth Woodside, and is home to around 5432 residents. Cragg Hill is located in a region that offers easy access to the surrounding countryside and urban areas.
Fuel drain cover in Cragg Hill and across West Yorkshire
Newlay, Whitecote and Horsforth Woodside are among the locations around Cragg Hill that the same teams work, answering petrol in diesel call-outs across Cragg Hill's LS postcode area. No need to bring your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations we drain.
At the petrol pump in Cragg Hill, right now?
Then you're in the best spot there can be. Leave the vehicle turned off, and ring.