Farndon: Petrol in a Diesel Car? How Worried to Be
Likely less than you already are — provided nobody has started it. Until your ignition primes your pump, your starter turns, or your car is driven, petrol in a diesel tank simply rests there and does no harm. Which makes the truthful reply to that first Farndon question — "have I ruined it?" — normally no. Keep it like that: leave the motor off and phone Petrol in Diesel. Keep reading for three things: the effect petrol has inside a diesel motor, the signs of how far it has got, and ways to make sure you don't do it again.
The engine and petrol in a diesel: what happens
Diesel has two jobs on its way through an engine. It protects to begin with, and only then does it burn. Built to very fine clearances, your injectors and the pump rely on your diesel flowing through them to keep their surfaces from wearing against one another.
The second job petrol does not do at all, and the first it does badly. It is thinner than diesel and takes away the protection the system rests on, so a pump running on a petrol mixture is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the opposite of what a diesel needs from its fuel. That is where the rattling comes from.
Taken together, they show what shape the problem has. Contact does not do the harm — movement does. All a tank with petrol in it amounts to is a fuel fault. The start of a mechanical problem is a pump that has been working on that petrol — and whatever a worn pump sheds travels on with the fuel to the injectors downstream.
Farndon, petrol in a diesel: four situations, from mild to major
Filled up, and never started: no case is better. The petrol is in your tank and just that tank, and the task is a drain and a flush where the vehicle sits. This is the one situation that can only truly take place at a forecourt, as anywhere else your car has been driven to get there.
Started for a moment, or just the ignition on. Once primed, your system has pulled petrol from that tank as far as the filter and the fuel lines. Still normally easy: drain, flush, and the filter sorted.
Driven a few miles. Now the pump has spent these miles running on thinned fuel. How hard your car was driven matters as much as how far, and the work covers your tank, the lines, the fuel filter and fresh fuel through the whole circuit. Short trips, such as the school run to St Peter's Crosskeys CofE Academy, are one thing. Very different again: a run to Nottingham, under 15 miles away, or any miles on the M1, under 25 miles from Farndon, where your engine kept working hard.
Driven on until it complained — rattling, smoke, a lumpy idle, a dead throttle. What you are hearing is the motor reporting fuel that no longer runs like diesel. Pull up wherever you are — the verge on Main Street, a lay-by, a side street — and leave the vehicle where it is. A vehicle pulled over quickly very rarely has long-term damage, as the fuel drain and the flush-through, which still come first, deal with it.
Farndon drivers and the 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." A fuller tank of the same mix is all it gives, because topping up removes nothing. A diesel fuel system doesn't tolerate petrol by percentage in the way that guidance supposes.
"Newer diesels can handle a little petrol" — a myth, and closer to the reverse. At higher pressure, through finer parts: that is how a modern diesel moves its fuel, so the lubrication matters for more, not less.
The myth that catches drivers out: if it starts and drives, it must be unharmed. A petrol motor fed diesel generally won't run, so the driver stops and the damage stops with them. Whilst the pump grinds, a diesel fed petrol normally starts, ticks over and drives away as if nothing has happened. Running does not mean fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a separate fault. The petrol is still in your tank afterwards, and what it has diluted isn't put back.
"Drain it yourself and you are sorted" — a myth, because after it's been running some petrol lies in the fuel filter and lines, ready to go right back through the pump at your next start. Besides, petrol drained into a can by the road is genuinely risky.
How does petrol in a diesel take place?
It is seldom carelessness, and nobody does it on purpose. One way only, since of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, while the diesel one generally will not fit a petrol vehicle. That is how the forecourt makes it straightforward.
Routine and the car getting out of step is how it occurs. Hire cars, courtesy cars, and vehicles that are new to you. A household with one petrol and one diesel on the drive. Your usual forecourt, its pumps now in a different order. Racing for a train at Rolleston and fuelling up en route. The first fill-up in a diesel Volkswagen Tiguan after years of driving petrol is exactly the moment it occurs. Your hand does what it has always done when you add rain, a phone call or a back seat full of children.
Next time you fill up around Farndon: avoiding petrol in a diesel
- The label is what counts, so check the pump rather than the colour: in the UK unleaded handles are normally green and diesel black, yet not on each forecourt.
- Many cars state the fuel type inside your filler flap or on the cap, so check it on the first fill in any car you don't know.
- One of each in the household? Label your key to the diesel — a bright fob, a sticker — since intending to remember isn't enough.
- "Diesel", aloud, before you lift the nozzle — each time a new or hired car gets its first tank. It sounds daft. It works.
- Tuck your phone away. This is an easy mistake to make while you are thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler designed to refuse a petrol nozzle, and add-on devices exist for the remainder. Count it as a safety net, and keep reading the petrol pump.
- Less petrol makes a weaker mixture, and so stop the moment you notice — while remembering that your next stage is unchanged. It's still not to start the car.
Petrol already in a diesel in Farndon? Begin here
Short and simple, then, is the order of things. Leave it unstarted, with the ignition off as well. If you're still on the forecourt — JET or anywhere else — ask the attendants to help you push it clear of the petrol pump. Next, 0333 366 0103. We will ask what got in, about how much, and if it has been run.
If it was AdBlue instead of petrol, say so. That is a different issue — corrosion and deposits and not lost protection — and it has its own page for Farndon.
One petrol in a diesel task around Farndon costs more than another. Why?
A fair single quote doesn't exist here: four situations, four separate jobs. Mostly, the cost moves with which situation you are in. Two things follow that: the petrol that got in as a proportion of what that tank holds, then the spot the vehicle is in and whether a technician can get to it safely.
What was put in, how much, and if it has run — three questions our technicians ask before pricing, not after, for exactly that reason. A range becomes a straight figure once those answers are in.
About Farndon, briefly
Farndon is a village situated on the banks of the River Trent in Nottinghamshire, with a low elevation of around 15 metres. Farndon lies near the villages of Thorpe, Hawton, and Staythorpe, and is approximately 14 miles from Nottingham. Farndon has a population of around 1289 people, predominantly living in detached houses. Farndon is located in the East Midlands region, about 111 miles north of London.
Fuel drain cover across Nottinghamshire, Farndon included
The vans answering petrol in diesel calls around Farndon, in the NG postcode area, also work the locations around it, Thorpe, Hawton and Staythorpe among them. The car doesn't need to come to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
At the petrol pump around Farndon, right now?
Then, you couldn't be in a better position. Keep the vehicle switched off, and ring.