Petrol in a Diesel Car in Stockmoor Village: How Worried Should You Be?
Likely less than you are now — as long as no one has started it. Until the ignition primes the pump, your starter cranks, or the car is driven, petrol in a diesel tank simply rests there and does nothing. Which means the honest reply to that first Stockmoor Village question — "have I ruined it?" — normally no. Petrol in Diesel is who to phone, with the engine left off, so it remains that way. The rest of this page covers what petrol actually does to a diesel, how to tell how far it has got, and how to make sure it does not happen to you again.
Petrol in a diesel: what does it do to the motor?
Passing through an engine, diesel is doing two jobs at once. It lubricates first, and after that does it burn. Designed to extremely fine clearances, your injectors and your pump depend on the diesel moving through them to stop their surfaces wearing against one another.
Of those two jobs, petrol manages the first poorly and the second not at all. Being less viscous than diesel, petrol strips out the protection a fuel system needs, leaving a pump on the mixture wearing itself. It is also made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the knocking.
Together, those make the shape of the trouble clear. The harm is done by circulation, not by contact. A tank with petrol in it is a fuel fault. After the pump has been running on that petrol, a mechanical fault has begun: whatever is shed by a pump that's grinding is carried downstream to the fuel injectors with your fuel.
Petrol in a diesel around Stockmoor Village: how bad is it? Four situations
Fuelled, and never started: no case is better. Being at a forecourt is what makes this the case: elsewhere, your car has been driven there to begin with. With that petrol kept inside that tank alone, it's drained and purged right where it stands, and nothing more is needed.
The ignition switched on, or a brief start. With the fuel system primed, the lines and filter already contain petrol that has come from that tank. That is usually still an easy job — a drain, a flush, and the filter seen to.
Driven a couple of miles. Now your pump has spent these miles running on thinned fuel. Miles is only half of it; how hard it was driven matters just as much. Either way the work runs to that tank, the lines, the filter and fresh fuel through the entire system. Short trips, such as the school run to Somerset Bridge Primary School, are one thing. Getting as far as Wells, under 25 miles away, makes a very different job — as does any miles on the M5, under a mile from Stockmoor Village, with the motor running hard the whole time.
It protested, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone ragged. What you are hearing is your motor reporting fuel that no longer behaves like diesel. Leave it wherever it has stopped: a lay-by, a side street, the verge on Cheviot Street. Long-term damage is very uncommon if a car is stopped soon, and the drain and flush-through that still come first sort it out.
What Stockmoor Village people get told about petrol in a diesel — and the myths in it
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 — that tank just holds more of the same mixture. Percentage is not how a diesel fuel system tolerates petrol, however much that guidance presumes.
"Newer diesels can handle a little petrol" — a myth, and closer to the reverse. At higher pressure, through finer components: that is how a modern diesel handles its fuel, and so the protection matters for more, not less.
Myth: "If it starts and drives, there's no harm done." This is the one that catches motorists. Any petrol engine fed diesel generally will not run, so the motorist stops and the harm stops with them. A diesel fed petrol normally starts, ticks over and drives away as though nothing has happened, whilst the pump wears. Running isn't the same as fine.
An outdated fix for a separate fault is behind this one. Myth: "Add some two-stroke oil and drive it home." It doesn't put back what petrol has diluted, and that petrol is still in the tank later.
Myth: "Drain the tank yourself and you're sorted." After the motor has run, some of the petrol is no longer inside your tank: it is in your filter and the lines, and it goes straight back through your pump on the next start. Also, a can of petrol filled at the kerbside is genuinely risky.
Petrol in a diesel: how does it take place?
It is rarely carelessness, and nobody does it on purpose. The forecourt makes it simple: the petrol nozzle is the slimmer of the two, and it slides into a diesel filler with almost no resistance, while a diesel nozzle mostly will not go into a petrol car at all. So the mistake runs one way.
Routine and the vehicle getting out of step is when it takes place. Any motor 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. The pumps in a different order on a familiar forecourt. A train to catch, and a hurried fill on the way to Bridgwater. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it occurs. With rain, a call coming in, or a car full of children to deal with, the hand simply does what it has always done.
Preventing petrol in a diesel next time you fill up in Stockmoor Village
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, though most usually do. Read the pump's label; the colour is just a clue.
- Check your filler flap. Many motors state the fuel type inside the flap or on the cap. Look at it on the first fill in a car you do not know.
- A coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember, for a household with one of each.
- "Diesel", aloud, before you pick up the nozzle — every time a new or hired car gets its first tank. It seems silly. It works.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck the phone away then keep your mind on the petrol pump.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to block a petrol nozzle, and add-on devices are available for the rest. Treat it as a backstop, and keep reading the petrol pump.
- Less petrol makes a thinner mix, and so stop the moment you notice — while remembering that the next stage is unchanged. It's still not to start the vehicle.
Already put petrol in a diesel in Stockmoor Village?
In that case, there is just a short order of things. Starting it is out, and so is turning on your ignition. If you are still on the forecourt — BP or anywhere else — ask the attendants to help you push the vehicle away from the pump. Then phone 0333 366 0103 and tell us what went in, about how much, and whether it's run.
If it was AdBlue and not petrol, say so. That is a separate fault — corrosion and deposits rather than lost protection — and it has its own page for Stockmoor Village.
What makes one Stockmoor Village petrol in a diesel task cost more than the next
Four different jobs sit behind the four situations above — which is why there is no honest single price. The scenario itself does most of the work of moving the cost. Where the vehicle is matters too, and whether a technician can safely reach it, after the share of petrol to what your tank takes.
Before any quote, not after, come three queries: your fuel that went in, the amount, and whether it's run. That's why. Given the answers, you get a straight figure rather than a range.
About Stockmoor Village, for a moment
Stockmoor Village is a suburban area in Somerset, located inland at an elevation of 11 metres, and is situated near several nearby places including Compass, Willstock Village, and Huntworth. Stockmoor Village has a population of approximately 2651 residents and is characterized by predominantly semi-detached housing. Stockmoor Village is also relatively close to the city of Wells, which is about 16.9 miles away, and is about 127.1 miles west of London.
Fuel drain cover across Somerset, Stockmoor Village included
Stockmoor Village waits in the TA postcode area, and our teams that answer petrol in diesel calls there work the locations around it as well — Compass, Willstock Village and Huntworth among them. Our engineers drain where the car is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
Stockmoor Village: still at the pump?
In that case, you couldn't be in a better spot. Keep it turned off, and ring.