Should You Worry? Petrol in a Diesel Car in Water Orton
If it has not been started, worry far less than you likely are. Petrol sitting in a diesel tank does nothing to your engine until something pulls it through the system — the ignition priming your pump, the starter, or the drive on its own. So the fair answer to the first query everyone around Water Orton asks, "have I wrecked it?", is generally no. Leave the engine off and phone Petrol in Diesel — that keeps it that way. What petrol actually does to a diesel, how to judge how far it's gone, and how to keep it from happening a second time: that's the remainder of this page.
Petrol in a diesel: what does it do to the engine?
Passing through a motor, diesel is doing two jobs at once. Before it ignites, it lubricates — then it combusts. What keeps the surfaces inside the high-pressure fuel pump and the fuel injectors from wearing down against each other is the diesel flowing through them — they are made to extremely fine tolerances.
Of these two jobs, petrol handles the first badly and the second not at all. It is thinner than diesel and removes the lubrication the fuel system rests on, so a pump running on a petrol blend is a pump wearing itself. And petrol is made to resist igniting under compression, which is the opposite of what a diesel needs from its fuel. That's where the clattering comes from.
Together, those make the shape of the trouble plain. Contact does not do the damage — movement does. All a tank with petrol in it amounts to is a fuel fault. Whatever a worn pump sheds travels on, carried by your fuel, into the fuel injectors downstream, which is why a pump that has worked on that petrol is where a mechanical issue begins.
How serious is petrol in a diesel? Four situations our technicians see in Water Orton
Fuelled up, not once started. The best case there is. On a forecourt, and genuinely only there, that petrol is still confined to your tank — because everywhere else the vehicle was driven to reach it. The task is draining and purging on the spot.
A moment's running, or merely the ignition on. Petrol has come out of that tank and got to the fuel filter and the lines, since your system has been bled. Usually nothing more than emptying, flushing and seeing to the filter, so still easy.
Driven a couple of miles. Now your pump has spent those miles labouring on diluted fuel. Distance is only half of that; how hard it was driven matters just as much. Either way this work includes that tank, the lines, the fuel filter and clean fuel through the whole circuit. Short trips, like the school run to Water Orton Primary School, are one matter. Very different again: a run to Birmingham, under 10 miles away, or any mileage on the M6, under a mile from Water Orton, where the motor never stopped labouring hard.
Driven till it complained. Clattering, an uneven idle, smoke, a throttle that has gone soft. What you are hearing is the engine reporting fuel that no longer behaves like diesel. Pull up wherever you are — the verge on Marsh Lane, a lay-by, a side street — and leave the car where it is. What goes first is still the fuel drain and flush-through, and that deals with it, with lasting damage very uncommon when a car is stopped soon.
Stories Water Orton people 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." Nothing is removed by topping up — you're left with a fuller tank, still the same mix. That guidance supposes a diesel fuel system handles petrol by percentage. It does not.
"Newer diesels can handle a little petrol" — a myth, and nearer the reverse. Protection counts more on modern diesels, not less, since their fuel passes through finer components at higher pressure.
This is the one that catches people. Myth: "If it starts and drives, there is no damage done." Feed diesel to a petrol motor and it usually won't run, and so the motorist stops — and the damage stops with them. A diesel fed petrol usually starts, idles and drives away as if nothing has happened, while the pump grinds. Being able to run isn't the same as being fine.
An old workaround for a distinct problem is behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." It doesn't put back what petrol has thinned, and that petrol is still inside your tank after that.
"Drain it yourself and you're sorted" — a myth, because after it has been running some petrol lies in your filter and lines, waiting to go right back through your pump on your next start. And, a can of petrol drained at the roadside is truly risky.
How it happens: petrol in a diesel
A careless moment is rarely the cause, and no one means to do it. The forecourt makes it easy: the petrol nozzle is the slimmer of the two, and it slips into a diesel filler with almost no resistance, whilst a diesel nozzle mostly won't go into a petrol vehicle at all. So the mistake runs one way.
It occurs when habit and the vehicle stop matching. Hire cars, courtesy cars, and vehicles that are new to you. Households running one of each, petrol and diesel. A forecourt you know, but with its pumps laid out differently. Rushing for a train outside the nearest station and fuelling up en route. Years of petrol cars behind you, a diesel Volkswagen Passat in front of you on the forecourt for its first tank — that's when. Add a back seat full of children, a phone call or rain, and the hand wins.
Water Orton people: how to prevent petrol in a diesel next time
- A green handle for unleaded and black for diesel is normal in the UK — yet not on each forecourt. Go by the label on the petrol pump, not the colour.
- In a vehicle you don't know, look inside the flap over your filler or at the cap before your first fill: many motors state the fuel there.
- One of each in the home? Label the key to your diesel — a coloured fob, a sticker — since intending to remember is not enough.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the pump. It sounds silly and it does the trick.
- Mistakes like this are straightforward to make whilst your mind is on something else, so your phone goes away.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to reject a petrol nozzle, and aftermarket devices are available for the remainder. Treat it as a safety net, then keep checking the petrol pump.
- Less petrol means a weaker mixture, and so stop the moment you realise — though remembering that your next stage is unchanged. It's still not to fire it up.
Petrol already in a diesel in Water Orton? Start here
Short and simple, then, is the order of things. Don't switch the ignition on, and do not fire it up. If you're still at the forecourt — Shell or anywhere else — ask the attendants to help you roll the car away from the petrol pump. What went in, about how much, and whether it has run: tell us that when you phone 0333 366 0103.
Corrosion and deposits are the trouble with AdBlue, whereas petrol means lost lubrication. So if it was AdBlue, say so — and read its own Water Orton page.
Water Orton petrol in a diesel tasks: why one costs more than another
The four situations above are four separate jobs, so no single quote for this would be fair. Mostly, your cost moves with which one you're in. Where the vehicle is matters too, and whether a van can safely get to it, after the proportion of petrol to what the tank holds.
Before any quote, not after, we ask three questions: the fuel that was put in, the volume, and whether it's run. That's why. Those replies change a range into a straight figure.
About Water Orton
Water Orton is a village in Warwickshire, situated on the banks of the River Tame, with a mix of semi-detached housing and open countryside. Water Orton sits at an elevation of 83 metres, approximately 7 miles northeast of Birmingham. Water Orton is close to nearby villages such as Curdworth and Minworth, and is within commuting distance of the city. Water Orton has a population of around 1389 residents.
Fuel drain cover in Water Orton and across Warwickshire
Our vans answering petrol in diesel calls in Water Orton, in the B postcode area, equally work the locations near it, Curdworth, Gilson and Minworth included. The car doesn't need to come to us: we drain on a forecourt, in a supermarket car park, in a lay-by or on your own drive.
Still at the pump around Water Orton?
The best position there is, then — that's where you are. Turned off it stays; then call.