Should You Worry? Petrol in a Diesel Car in Broadmayne
Provided it hasn't been started, you can worry far less than you probably are. "Have I wrecked it?" is the first thing everyone in Broadmayne asks, and the truthful answer is normally no, because petrol resting in a diesel tank harms nothing until it is drawn through your fuel system — by ignition priming, by your starter, or by driving. Leave your motor off and phone Petrol in Diesel — that keeps it like that. Below, you will find what petrol really does inside a diesel, how far it may have got, and how to stop it happening to you a second time.
What petrol in a diesel does to the engine
On its way through an engine, diesel has two jobs. It combusts, and before it burns it lubricates. Designed to very fine tolerances, the injectors and your pump depend on the diesel flowing through them to stop their surfaces wearing against one another.
The second job petrol does not do at all, and the first it does poorly. The knocking comes from petrol being made not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is runnier than diesel, it strips out the lubrication your system depends on, and any pump working on such a mixture is wearing itself.
Put those together and the shape of the problem is clear. Not contact but movement is what does the damage. Petrol in the tank is a fuel fault. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds travels on with the fuel to the injectors further on.
How bad is petrol in a diesel? Four scenarios we see in Broadmayne
Fuelled up, never started. The best case there can be. The petrol is inside the tank and just that tank, and the job is a drain and a flush where the car stands. This is the one scenario that can only truly occur on a forecourt, because anywhere else your car has been driven to get there.
Your ignition switched on, or a brief start. The fuel system has been bled, so petrol has left the tank and got to the filter and your lines. Drain, flush, deal with the fuel filter: still normally simple.
The pump has worked a few miles on weakened fuel — that is what driving the car does. Tank, lines, filter, then fresh fuel run through the entire system: that's this work, and the way the vehicle was driven counts as much as the mileage. Short trips, like the school run to Broadmayne First School, are one matter. Very different a second time: a run to Salisbury, under 50 miles away, or some distance on the M5, under 50 miles from Broadmayne, where your engine never stopped working hard.
It complained, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone lumpy. The engine is telling you the fuel is no longer behaving like diesel. Stop on the spot — on the verge on Main Street, at the kerb, down a side road — and don't move it. A vehicle pulled over early very rarely has lasting damage, since the fuel drain and the flush-through, which still come first, take care of it.
What Broadmayne people get told about petrol in a diesel — and the stories in it
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Topping up removes nothing; it gives you a bigger tank of the same mix. Percentage isn't how a diesel fuel system copes with petrol, however much that advice supposes.
If anything, the opposite holds. Myth: "A newer diesel can cope with a bit of petrol." Protection counts more on modern diesels, not less, because their fuel passes through more precise components at higher pressure.
Myth: "If it starts and drives, there's no harm done." This is the one that catches people. Any petrol motor fed diesel usually will not 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. Fine and running are not the same thing.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a distinct problem. None of what petrol diluted is put back by it — and later, your tank still contains the petrol.
Once the motor has been run, part of that petrol is in the filter and the lines, not the tank — and the next start sends it straight back through the pump. So the myth "drain that tank yourself and you are sorted" doesn't stand up. Also, a can of petrol drained at the roadside is genuinely risky.
Petrol in a diesel: how does it take place?
On purpose? Never. Through carelessness? Seldom, if ever. The forecourt makes it easy: the petrol nozzle is the narrower of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle generally will not go into a petrol car at all. So the error runs one way.
It takes place when habit and the vehicle stop matching. A car that's new to you — hired, on loan as a courtesy car, or just bought. One petrol and one diesel on the driveway of the same household. A familiar forecourt with the pumps in a different order. Filling up in a rush en route to Dorchester South, with a train to catch. Precisely the moment it takes place: after years of driving petrol, someone fills a diesel Volkswagen Golf for the first time. With rain, a call arriving, or a car full of children to deal with, your hand just does what it always has.
Broadmayne motorists: how to avoid petrol in a diesel next time
- Not every forecourt in the UK follows green for unleaded and black for diesel, though most generally do. Check the petrol pump's label; the colour is only a clue.
- The first fill in a strange vehicle is the time to check your filler flap — on it, or on the cap, many vehicles state the fuel to use.
- Good intentions count for less than a sticker or a fob in a vivid colour on the diesel's key when a house has one of each. So label it.
- It sounds silly and it does the trick: on your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump.
- Whilst you're thinking about something else, this is an easy mistake to make — so tuck your phone away.
- Some diesels come with a filler built to refuse a petrol nozzle, and devices you can add are available for cars without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the pump.
- Noticing it halfway? Stop at once. A weaker mix follows from less petrol inside that tank, yet your next step stays the same: do not fire it up.
Petrol already in a diesel around Broadmayne? Start here
The order of things is short, then. Do not turn your ignition on, and do not fire it up. Ask the staff to help you roll it away from the petrol pump if you're still on the forecourt, whether that's Texaco or somewhere else. Next, 0333 366 0103. We'll ask what went in, roughly how much, and if it's been run.
If it was AdBlue and not petrol, say so. That's a separate issue — corrosion and deposits instead of lost lubrication — and it has its own page for Broadmayne.
One petrol in a diesel job in Broadmayne costs more than another. Why?
The four situations above are four different jobs, so no single quote for this would be fair. The situation itself does most of the work of moving your cost. Two things come after that: the petrol that got in as a share of what the tank takes, then the spot the vehicle is in and whether our van can reach it safely.
Three queries come first, before quoting, rather than after — what got in, how much, has it run — and that is the reason. Those answers are what turn a range into one firm number.
About Broadmayne and its setting
Broadmayne is a village in south Dorset, situated near the coast at an elevation of around 49 metres. Broadmayne lies close to the villages of West Knighton, Whitcombe, and Warmwell, and is approximately 37 miles from the city of Salisbury. Broadmayne has a population of around 1284 people, predominantly living in detached houses. Broadmayne is also within a reasonable distance from London, at around 113 miles away.
Fuel drain cover in Broadmayne and across Dorset
Our vans answering petrol in diesel jobs around Broadmayne, in the DT postcode area, equally work the spots around it, West Knighton, Whitcombe and Warmwell included. The vehicle does not need to move to us: our technicians drain on a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
At the pump in Broadmayne, still?
The best spot there is, then — that is where you are. Phone, and leave it switched off.