Should You Worry? Petrol in a Diesel Car in Greenside
Less than you probably are, if it has not been started. Petrol sitting in a diesel tank does nothing to the motor until something draws it through your fuel system — your ignition priming the pump, the starter, or the drive on its own. So the fair answer to the first question everyone in Greenside asks, "have I ruined it?", is usually no. Leave the engine off then phone Petrol in Diesel — that is how you keep it like that. Keep reading for three things: the effect petrol has inside a diesel motor, the clues of how far it has got, and the way to make sure you don't repeat it.
What petrol in a diesel does to the engine
Passing through a motor, diesel does two jobs at once. Before it burns, it protects — then it ignites. What stops the surfaces inside the high-pressure fuel pump and the fuel injectors from wearing down against each other is your diesel flowing through them — they are built to extremely fine clearances.
The second task petrol doesn't 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 the blend wearing itself. It's also made to resist igniting under compression — the opposite of what a diesel needs — which is why you hear the clattering.
The shape of the problem is plain when you put those together. Not contact but circulation is what causes the harm. Petrol in the tank is a fuel fault. Once the pump has been labouring on that petrol, a mechanical fault has started: anything shed by a pump that is wearing is carried downstream to the fuel injectors with your fuel.
Four situations our technicians see in Greenside: how serious is petrol in a diesel?
The best case there can be: filled up, not once started. 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's drained and flushed right where it stands, and nothing more is needed.
A brief spell of 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 primed. Usually nothing more than draining, purging and sorting the filter, and so still easy.
A few miles driven, and the pump has spent every one of them labouring on weakened fuel. Tank, lines, filter, then fresh fuel run through the whole system: that is the work, and the way the car was driven matters as much as the distance. On the school run to Dalton School, the miles is short. A run as far as Bradford, under 15 miles away, is a very different job. So is any miles on the M62, under 3 miles from Greenside, where the engine has been working hard throughout.
Clattering, an uneven idle, smoke, a throttle gone soft: driven until it complained. The fuel isn't behaving like diesel any more, and the motor is saying so. Pull up on the spot — on the verge on Green Lea Road, at the kerb, down a side road — and do not move it. Lasting damage is very rare if a vehicle is pulled over early, and the fuel drain and flush that still come first take care of it.
Myths Greenside people hear about petrol in a diesel
Myth: topping up to full with diesel makes it fine. It does not. Nothing is removed when you top up — that tank simply carries more of the same blend. The assumption behind that advice — that diesel fuel systems tolerate petrol by percentage — is wrong.
"Newer diesels can handle a little petrol" — a myth, and closer to the reverse. At higher pressure, through more precise parts: that is how a newer diesel moves its fuel, and so the lubrication counts more, not less.
This is the one that catches motorists. Myth: "If it starts and drives, there is no harm done." The driver of a petrol engine fed diesel normally has no choice but to stop, since it will not run, and the harm stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile the pump wears. Being able to run is not the same as being fine.
Myth: a two-stroke additive makes it safe to drive home. It was an old fix, supposed for another issue. None of what petrol thinned is put back by it — and afterwards, that tank still holds the petrol.
Myth: "Drain that tank yourself and you're sorted." Once the motor has run, some of the petrol is no longer in that tank: it's in your filter and the fuel lines, and it goes straight back through your pump at your next start. And, a can of petrol filled by the roadside is genuinely dangerous.
Petrol in a diesel: how does it happen?
No one does it on purpose, and it is rarely carelessness. The forecourt makes it simple: the petrol nozzle is the narrower of the two, and it slips into a diesel filler with almost no resistance, while a diesel nozzle mostly won't go into a petrol car at all. So the mistake runs one way.
Habit and the car getting out of step is when it takes place. Courtesy car, hire car, or a motor that is brand new. One petrol and one diesel on the driveway of the same household. A forecourt you know, only with its pumps arranged differently. A hurried fill on the way to Huddersfield with a train to catch. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it occurs. Throw in rain, a phone call or a back seat full of kids, and your hand repeats what it has always done.
Greenside people: how to prevent petrol in a diesel next time
- The label is what counts, and so check the petrol pump rather than the colour: in the UK unleaded handles are normally green and diesel black, but not on every forecourt.
- Inspect the filler flap. Plenty of vehicles state the fuel inside the flap or on the cap. Look at it on your first fill in a motor you don't know.
- Good intentions count for less than a sticker or a fob in a bright colour on your diesel's key when a home has one of each. So mark it.
- Before the nozzle comes off the pump the first time you fill a hired or new car, say "diesel" aloud. Daft, perhaps, yet it does the trick.
- Mistakes like this are simple to make whilst your mind is on something else, so the phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to refuse a petrol nozzle, and add-on devices are available for cars without one. They are a backstop, not a reason to stop reading the petrol pump.
- Stop the moment you realise. Less petrol in that tank means a thinner blend. It does not change what to do next, which is still not to start the car.
Already put petrol in a diesel around Greenside?
Then, there is just a short order of things. Leave it unstarted, with your ignition off too. Ask the attendants to help you push it away from the pump if you are still on the forecourt, whether that is Tesco or somewhere else. What went in, about how much, and whether it's run: tell us that when you phone 0333 366 0103.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a separate problem — Greenside has a page just for it.
Why one petrol in a diesel job in Greenside costs more than another
The four situations above are four different tasks, so no single price for this would be honest. The scenario itself does most of the work of moving your cost. Two things come after that: the petrol that went in as a share of what that tank holds, then the spot your car is in and whether a van can get to it safely.
That is why our technicians ask three questions before costing instead of after: what went in, how much, and whether it's run. Those replies turn a range into a straight figure.
About Greenside
Greenside is a suburban area in West Yorkshire, situated near the riverside at an elevation of 78 metres. Greenside lies approximately 10 miles from Bradford and is part of the larger urban landscape of West Yorkshire. Greenside has a mix of housing types, with semi-detached homes being the predominant form of accommodation. Greenside is also located near other local places, including Tandem, Waterloo, and Grove Place.
Across West Yorkshire and around Greenside: fuel drain cover
Petrol in diesel call-outs in Greenside — part of the HD postcode area — go to vans that also cover the places about it, Tandem, Waterloo and Grove Place included. No need to move your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations where we work.
In Greenside and still at the pump?
In that case, you could not be in a better spot. Call, and leave it turned off.