Petrol in a Diesel Car in Maiden Newton: How Worried Should You Be?
Provided it hasn't been started, you can worry less than you probably are. Petrol resting in a diesel tank does nothing to your engine till something pulls it through the system — your ignition priming your pump, your starter, or the drive on its own. So the truthful answer to the first question everyone around Maiden Newton asks, "have I wrecked it?", is generally no. To keep the vehicle that way, phone Petrol in Diesel and leave your engine switched off. Below, this page sets out what petrol actually does inside a diesel, how far it might have gone, and how to stop it happening to you a second time.
Inside your engine: what petrol in a diesel does
Diesel does two tasks on its way through an engine. Before it ignites, it lubricates — then it combusts. Designed to very fine tolerances, your injectors and the pump depend on the diesel moving through them to keep their surfaces from wearing against one another.
Petrol does the first job badly and the second not at all. The knocking comes from petrol being made not to ignite when compressed, which is precisely the opposite of what a diesel needs. On top of that it is runnier than diesel, it strips away the lubrication your system hinges on, and any pump running on that mix is wearing itself.
Together, those make the shape of the problem clear. It's movement that does the harm, not contact. Any tank with petrol in it is a fuel problem. Whatever a worn pump sheds goes on, borne by the fuel, into the injectors downstream, which is why a pump that has worked on the petrol is where a mechanical problem begins.
Maiden Newton, petrol in a diesel: four cases, from mild to significant
Fuelled but not once started — the best it gets. Being on a forecourt is what makes this the case: elsewhere, the vehicle has been driven there to begin with. With the petrol held in your tank alone, it is cleared and cleaned on the spot, and nothing more is needed.
A moment's running, or merely the ignition on. The system has been primed, and so petrol has left that tank and reached the fuel filter and the lines. Still normally simple: drain, flush, and the fuel filter seen to.
Driven a few miles. Now your pump has spent these miles running on weakened fuel. Distance is only half of it; how hard it was driven matters just as much. Either way this work includes your tank, the fuel lines, your filter and fresh fuel through the whole system. Short trips, such as the school run to Maiden Newton, Greenford Church of England Primary School, are one thing. A run as far as Wells, under 50 miles away, is a very different task. So is any mileage on the M5, under 50 miles from Maiden Newton, where the engine has been working hard throughout.
It complained, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone ragged. The engine is telling you your fuel is no longer acting like diesel. Whether it is the verge on The Cornstores, a lay-by or a side road, stop where you are and leave it. The drain and flush-through still come first, and they deal with it: when a vehicle is stopped quickly, lasting damage is very unusual.
Maiden Newton people and that petrol in a diesel stories they hear
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing is removed when you top up — that tank simply holds more of the same blend. The assumption behind the advice — that diesel fuel systems accept petrol by percentage — is wrong.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the reverse. Finer components and higher pressure are how a current diesel runs its fuel, and that makes the lubrication count more, not less.
Myth: "If it starts and drives, there's no harm done." This is the one that fools people. Feed diesel to a petrol motor and it generally won't run, so the motorist stops — and the harm stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually will; meanwhile the pump grinds. Running is not the same as fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a distinct fault. That petrol is still in the tank afterwards, and whatever it has diluted is not put back.
The next start draws petrol back round the pump out of the lines and the filter, where some of it sits once the motor has run. That's why a DIY tank drain does not sort it — a myth. Besides, petrol drained into a can by the road is truly risky.
Petrol in a diesel: how does it happen?
Nobody does it on purpose, and it's seldom carelessness. A diesel nozzle generally won't fit a petrol vehicle, yet the smaller petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one mistake easy, and only in that direction.
The moment routine stops matching your car is the moment it happens. A new vehicle, a hire car or a courtesy car. Two vehicles on one drive, one petrol, one diesel. Your ordinary forecourt, its pumps now in a different order. Racing for a train at the nearest station and filling up en route. A new-to-you diesel Renault Megane, its first fuelling, and a driver used to petrol: exactly when it takes place. Your hand repeats what it has always done when you add rain, a phone call or a back seat full of kids.
Maiden Newton drivers: how to avoid petrol in a diesel next time
- Check the petrol pump, not the colour. In the UK unleaded handles are generally green and diesel black, yet not on every forecourt. The label is what counts.
- The first fill in a strange motor is the time to check the filler flap — on it, or on the cap, plenty of motors state which fuel to use.
- Mark 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 meaning to remember.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the petrol pump. It seems daft and it works.
- Mistakes like this are easy to make while your mind is on something else, and so your phone goes away.
- Add-on devices exist for cars without one, and some diesels come with a filler that will not accept a petrol nozzle. Useful — but a safety net at best, never a reason to stop checking the label.
- The moment you realise, stop: less petrol in the tank makes a thinner mix. What to do next doesn't change, though — still do not start it.
Maiden Newton: already put petrol in a diesel?
In that case, there is just a short order of things. Leave it unstarted, with the ignition switched off as well. The staff at the forecourt — whether at Texaco itself or wherever you filled up — will usually help push it away from the pump if you ask. Then call 0333 366 0103 and tell us what went in, roughly how much, and if it's run.
If it was AdBlue instead of petrol, say so. That's a different problem — corrosion and deposits rather than lost protection — and it has its own page for Maiden Newton.
Maiden Newton petrol in a diesel tasks: why one costs more than another
Four separate tasks lie behind the four scenarios above — which is why there's no fair single price. What shifts the cost is chiefly which of them you are in. Two things come after that: the petrol that got in as a share of what your tank takes, then the place your car is in and whether our van can reach it safely.
That's why our engineers ask three questions before quoting rather than after: what went in, how much, and whether it's run. Those replies are what change a range into one firm number.
About Maiden Newton, briefly
Maiden Newton is a village in Dorset, situated on the banks of a river at an elevation of around 95 metres. Maiden Newton has a population of approximately 835 people, with a predominance of detached housing. Maiden Newton is located near several smaller settlements, including Tollerford, Cruxton, and Chilfrome, and is about 30 miles from the city of Wells. Maiden Newton is also within a reasonable distance from London, at around 117 miles away.
Across Dorset and around Maiden Newton: fuel drain cover
Petrol in diesel jobs around Maiden Newton — part of the DT postcode area — go to teams that also cover the places about it, Tollerford, Cruxton and Chilfrome included. A forecourt, a supermarket car park, a lay-by or your own driveway are all places we work, and the car doesn't need to come to us.
At the pump around Maiden Newton, right now?
The best position there is, then — that's where you are. Leave it turned off, then ring.