Should You Worry? Petrol in a Diesel Car in Talysarn
Not started? Then less anxious than you likely are. "Have I wrecked it?" is the first thing everyone in Talysarn asks, and the truthful answer is generally no, since petrol resting in a diesel tank hurts nothing till it is dragged through the system — by ignition priming, by your starter, or by driving. Leave the motor off then phone Petrol in Diesel — that is how you keep it that way. Read on for three things: the effect petrol has inside a diesel motor, the signs of how far it has spread, and ways to make sure you never do it again.
Petrol in a diesel: what does it do to the engine?
On its way through a motor, diesel does two tasks. It protects to begin with, and after that does it burn. Very fine clearances are built into the injectors and your high-pressure pump, and only the diesel running through stops their surfaces grinding together.
Of those two jobs, petrol manages the first badly and the second not at all. A pump running on a petrol mix is wearing itself out, since petrol is runnier than diesel and strips out the protection the fuel system relies on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel needs from its fuel — and that is where the clattering starts.
Put those together and the shape of the issue is plain. The harm is done by movement, not by contact. All a tank with petrol in it amounts to is a fuel problem. A pump that has been running on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with the fuel to your injectors downstream.
How bad is petrol in a diesel? Four scenarios our technicians see around Talysarn
Fuelled, and never started: nothing beats it. Being at a forecourt is what makes this possible: elsewhere, the car has been driven there to begin with. With the petrol kept inside the tank alone, it's cleared and flushed on the spot, and nothing more is needed.
The ignition switched on, or a brief start. Your system has been bled, so petrol has left your tank and reached the filter and the lines. Still normally straightforward: drain, flush, and the filter dealt with.
Driven a couple of miles. Now your pump has spent those miles working on diluted fuel. Mileage is only half of that; how hard it was driven matters just as much. Either way this work runs to that tank, the lines, your filter and clean fuel through the whole system. On the school run to the local primary school, the distance is small. Driving as far as Bangor, under 15 miles away, makes a very different task — as does any miles on the Moreton Spur, over 50 miles from Talysarn, with the engine working hard all the way.
Driven on till it complained — knocking, smoke, an uneven idle, a soft throttle. The motor is telling you the fuel is no longer acting like diesel. Stop wherever you are — the verge on County Road, a lay-by, a side street — then leave it there. The drain and flush still come first, and they take care of it: when a car is stopped soon, lasting damage is very uncommon.
Talysarn motorists and that petrol in a diesel myths they hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Nothing comes out when you top up — that tank just carries more of the same mixture. A diesel fuel system does not accept petrol by percentage in the way that guidance supposes.
If anything, the opposite holds. Myth: "A current diesel can cope with a bit of petrol." Smaller components and higher pressure are the way a current diesel runs its fuel, and that makes the protection count more, not less.
This is the one that fools people. Myth: "If it starts and drives, there is no harm done." Feed diesel to a petrol engine and it usually won't run, and so the motorist stops — and the harm stops with them. Whilst the pump wears, a diesel fed petrol usually starts, ticks over and drives away as if nothing has happened. Running isn't the same as fine.
An old fix for a distinct fault is behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." What petrol has weakened stays thinned, and that petrol remains inside the tank regardless.
The next start draws petrol back round the pump from your lines and your filter, where some of it sits after the motor has run. That is why draining your tank yourself doesn't leave you sorted — a myth. It is also really dangerous to drain petrol into a can at the roadside.
How petrol ends up: petrol in a diesel
Nobody does it on purpose, and it is seldom carelessness. A diesel nozzle generally will not go into a petrol vehicle, but the slimmer petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one error straightforward, and just in one direction.
When habit and your car stop matching, it happens. Hire cars, courtesy cars, and vehicles that are new to you. Two vehicles on one drive, one petrol, one diesel. The pumps in a different order on a well-known forecourt. Filling up in a rush on the way to Criccieth, with a train to catch. The first fill-up in a diesel Renault Clio after years of driving petrol is precisely the moment it takes place. With rain, a call arriving, or a car full of children to deal with, your hand simply does what it has always done.
How to prevent petrol in a diesel at your next fill-up around Talysarn
- 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 pump, not the colour.
- Plenty of vehicles state the fuel type inside the filler flap or on the cap, and so check there on your first fill in a motor you do not know.
- One of each in the house? Label the key to the diesel — a coloured fob, a sticker — because intending to remember isn't enough.
- "Diesel", out loud, before you pick up the nozzle — each time a new or hired car gets its first tank. It seems silly. It works.
- Tuck your phone away. This is an easy mistake to make whilst you're thinking about something else.
- Add-on devices exist for motors without one, and some diesels come with a filler that won't accept a petrol nozzle. Useful — but a backstop at best, never a reason to stop checking the label.
- Less petrol means a thinner mixture, so stop the moment you notice — though remembering that your next stage is unchanged. It is still not to crank it.
Put petrol in a diesel in Talysarn already?
Then the order of things is short. Do not turn the ignition on, and don't crank it. The attendants at the forecourt — whether at Independent itself or wherever you filled up — will usually help push it clear of the petrol pump if you ask. Then call 0333 366 0103 and tell us what got in, roughly how much, and whether it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost lubrication, make it a separate issue — Talysarn has a page just for it.
Talysarn petrol in a diesel jobs: why one costs more than another
Four different jobs lie behind the four scenarios above — which is why there is no honest single quote. Which of them you are in is mostly what shifts your cost. The proportion matters next, meaning how much of your tank is petrol, followed by the position of your car and whether getting to it is safe for our van.
That's why our engineers ask three questions before quoting instead of after: what got in, how much, and whether it's run. With those answers, there is a straight figure rather than a range.
About Talysarn and where it is
Talysarn is a small village in Gwynedd, Wales, situated on the banks of a river at an elevation of around 110 metres. Talysarn lies near the villages of Cilgwyn, Penygroes, and Llanllyfni, and is approximately 13 miles from the city of Bangor. Talysarn has a population of around 732 people, predominantly living in terraced housing. Talysarn is located in a scenic area, with the Snowdonia National Park nearby.
Talysarn and Gwynedd: where our fuel drain cover reaches
Cilgwyn, Penygroes and Llanllyfni are among the locations around Talysarn that the same vans work, answering petrol in diesel call-outs across Talysarn's LL postcode area. A forecourt, a supermarket car park, a lay-by or your own drive are all spots our engineers drain, and the vehicle does not need to move to us.
Still at the petrol pump around Talysarn?
Then you're in the best spot there is. Switched off it stays; then ring.