Petrol in a Diesel Car in Keddington: How Worried Should You Be?
Far less than you likely are, if it has not been started. Petrol sitting in a diesel tank does nothing to your engine until something draws it through the fuel system — your ignition priming the pump, the starter, or the drive itself. So the honest answer to the first question everyone in Keddington asks, "have I wrecked it?", is usually no. Leave your engine off then ring Petrol in Diesel — that is how you keep it like that. The rest of this page sets out 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 a second time.
What petrol in a diesel does to the engine
On its way through a motor, diesel does two tasks. It combusts, and before it burns it protects. Designed to very fine clearances, the injectors and the pump rely on the diesel moving through them to stop their surfaces wearing against one another.
Badly at the first, not at all at the second: that is petrol. A pump running on a petrol blend is wearing itself out, because petrol is runnier than diesel and strips out the lubrication your fuel system relies on. Petrol is also designed to resist igniting under compression — the opposite of what a diesel needs from its fuel — and that is where any knocking starts.
Combined, those make the shape of the issue clear. Not contact but movement is what causes the harm. Where the petrol is only inside your tank, it is an issue of fuel, nothing more. A pump that has been working on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with your fuel to your injectors further on.
Four scenarios our engineers see in Keddington: how bad is petrol in a diesel?
The best case there can be: filled up, not once started. Being at a forecourt is what makes this the case: elsewhere, the vehicle has been driven there to begin with. With that petrol held in the tank alone, it is cleared and purged right where it stands, and nothing more is needed.
Started for a second, or only your ignition on. With the system primed, your lines and filter already hold petrol that came from your tank. Still usually easy: drain, flush, and the filter seen to.
Your pump now spent a couple of miles on thinned fuel — that's what driving the vehicle does. How hard the vehicle was driven matters as much as how far, and the work takes in the tank, the fuel lines, the filter and fresh fuel through the entire system. Short trips, like the school run to Lacey Gardens Junior Academy, are one thing. Very different again: a trip to Lincoln, under 50 miles away, or some distance on the M180, under 25 miles from Keddington, where your engine never stopped working hard.
Driven till it complained. Rattling, a lumpy idle, smoke, a throttle that has gone soft. That's the engine telling you its fuel has stopped acting like diesel. Leave it where it has stopped: a lay-by, a side street, the verge on Cowslip Lane. The fuel drain and flush-through still go first, and they sort it out: when a car is pulled over soon, permanent damage is very rare.
Myths Keddington drivers hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." A bigger tank of the same mixture is all it gives, because topping up takes out nothing. A diesel fuel system does not accept petrol by percentage in the way that advice assumes.
Not so: a newer diesel copes with a bit of petrol. If anything, the reverse. At higher pressure, through finer components: that is how a newer diesel moves its fuel, and so the protection matters more, not less.
One myth that catches motorists out: if it starts and drives, it must be unharmed. Diesel in a petrol motor usually leaves a motor that will not run: the driver stops, and so does the damage. A diesel fed petrol generally starts, idles and drives away as though nothing has happened, while the pump grinds. Running isn't the same as fine.
An old fix for a different issue lies behind this one. Myth: "Add some two-stroke oil and drive it home." The petrol is still inside your tank afterwards, and what it has weakened isn't put back.
"Drain it yourself and you are sorted" — a myth, because after it's been running some petrol sits in the fuel filter and lines, ready to go straight back through your pump on the next start. Besides, petrol drained into a can by the road is genuinely dangerous.
Why petrol in a diesel takes place at all
A careless moment is rarely the cause, and no one means to do it. The petrol nozzle is the smaller of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally won't go into a petrol vehicle at all. The forecourt makes it simple, and the slip runs one way.
The moment routine stops matching the car is the moment it takes place. A motor that is new to you — a hire car, on loan as a courtesy car, or brand new. Households running one of each, petrol and diesel. A forecourt you know, only with its pumps laid out differently. Rushing for a train outside the nearest station and fuelling up en route. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it happens. With rain, a call arriving, or children to deal with, the hand just does what it always has.
Next time you fill up in Keddington: avoiding petrol in a diesel
- The label is what matters, and so read the pump instead of the colour: in the UK unleaded handles are usually green and diesel black, but not on each forecourt.
- Inspect your filler flap. Plenty of cars state the fuel type inside the flap or on the cap. Look at 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 coloured fob, a sticker — because meaning to remember is not enough.
- "Diesel", aloud, before you pick up the nozzle — each time a new or hired car gets its first tank. It sounds daft. It does the trick.
- Put the phone away. This is an easy mistake to make while you're thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler built to refuse a petrol nozzle, and aftermarket devices are available for the remainder. Treat it as a backstop, and keep checking the petrol pump.
- Less petrol means a thinner mixture, so stop the moment you realise — though remembering that your next step is unchanged. It is still not to start it.
Keddington: already put petrol in a diesel?
The order of things is brief, then. Leave it unstarted, with your ignition switched off as well. The attendants at the forecourt — whether at Esso itself or wherever you filled up — will normally help push it away from the pump if you ask. Then phone 0333 366 0103 and tell us what was put in, roughly how much, and if it's run.
Say so if it was AdBlue rather than petrol: it is a different issue, with its own page for Keddington, since AdBlue brings corrosion and deposits instead of lost protection.
Keddington petrol in a diesel tasks: why one costs more than another
A fair single quote doesn't exist here: four scenarios, four separate tasks. Which of them you're in is chiefly what shifts the cost. Two things follow that: the petrol that went in as a proportion of what the tank holds, then the spot the car is in and whether our van can get to it safely.
Three queries come first, before quoting, instead of after — what got in, how much, has it run — and this is the reason. The replies turn a range into a straight figure.
About Keddington and its setting
Keddington is a small locality in Lincolnshire, situated on the riverside at a low elevation of around 12 metres. Keddington lies near the villages of Keddington Corner and Stewton, and is also close to the market town of Louth. Keddington has a population of approximately 516 people, with a predominance of semi-detached housing.
Keddington and Lincolnshire: where our fuel drain cover reaches
The vans answering petrol in diesel jobs around Keddington, in the LN postcode area, equally work the locations near it, Keddington Corner, Stewton and Louth included. A forecourt, a supermarket car park, a lay-by or your own driveway are all locations our technicians drain, and your vehicle doesn't need to move to us.
Keddington: still at the petrol pump?
Then you're in the best place there is. Ring, and keep it turned off.