Petrol in a Diesel Car in Littlefield: How Worried Should You Be?
Probably less than you are now — provided no one has started the car. "Have I wrecked it?" is the first question anyone in Littlefield asks, and the truthful answer is generally no, since petrol resting in a diesel tank hurts nothing till it's drawn through the system — by ignition priming, by the starter, or by driving. Keep it like that: leave the motor off then phone Petrol in Diesel. The remainder of this page sets out what petrol actually does to a diesel, how to judge how far it has got, and how to make sure it does not happen to you a second time.
Petrol in a diesel: what does it do to your engine?
Passing through a motor, diesel is doing two things at once. It ignites, and before it combusts it lubricates. Very fine clearances are built into the injectors and the high-pressure pump, and just your diesel running through stops their surfaces grinding together.
Poorly at the first, not at all at the second: that is petrol. It's thinner than diesel and takes away the lubrication the fuel system hinges on, and so a pump running on a petrol blend is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That's where the knocking comes from.
Put these together and the shape of the problem is plain. It is movement that does the damage, not contact. All a tank with petrol in it amounts to is a fuel problem. Whatever a worn pump sheds travels on, borne by the fuel, into the fuel injectors downstream, which is why a pump that has worked on the petrol is where a mechanical problem starts.
Littlefield, petrol in a diesel: four situations, from mild to significant
The best case there can be: filled up, not once started. That petrol is inside the tank and only the tank, and the task is a drain and a flush where your car sits. This is the one situation that can only truly occur on a forecourt, since anywhere else the car has been driven to get there.
Started for a moment, or just the ignition on. The system has been bled, and so petrol has left the tank and got to the fuel filter and the fuel lines. Usually nothing more than emptying, flushing and seeing to the filter, so still straightforward.
Driven a couple of miles. Now the pump has spent these miles working on thinned fuel. The work is your tank, the lines, the filter and fresh fuel through the whole circuit, and how hard your car was driven counts as much as how far. A school run to Macaulay Primary Academy is one thing. Driving as far as Kingston upon Hull, under 25 miles away, makes a very different task — as does any miles on the M180, under 15 miles from Littlefield, with the engine working hard all the way.
Driven on till it protested — rattling, smoke, a lumpy idle, a dead throttle. The fuel isn't acting like diesel any more, and the motor is saying so. Whether it's the verge on Landeck Avenue, a lay-by or a side street, stop there and leave it. Lasting damage is very uncommon if a car is pulled over quickly, and the drain and flush that still go first take care of it.
Littlefield drivers and the petrol in a diesel stories 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 — your tank just holds more of the same blend. A diesel fuel system doesn't accept petrol by percentage in the way that advice supposes.
"Newer diesels can handle a little petrol" — a myth, and nearer the opposite. A modern diesel sends its fuel through more precise components at higher pressure, which makes the lubrication matter more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that catches people. The driver of a petrol motor fed diesel normally stops, since it will not run, and the damage stops there. While the pump wears, a diesel fed petrol normally starts, idles and drives away as though nothing has happened. Being able to run isn't the same as being fine.
An old workaround for a separate fault is behind this one. Myth: "Add some two-stroke oil and drive the car home." It does not put back what petrol has thinned, and the petrol is still inside the tank later.
Once the engine has been run, part of the petrol is in the filter and the fuel lines, not your tank — and the next start pulls it straight back through your pump. So the myth "drain the tank yourself and you are sorted" doesn't stand up. On top of that, petrol drained into a can by the road is truly risky.
How does petrol in a diesel happen?
On purpose? Never. Through carelessness? Seldom, if ever. The forecourt makes it easy: the petrol nozzle is the narrower of the two, and it slips into a diesel filler with almost no resistance, whilst a diesel nozzle generally won't go into a petrol motor at all. So the mistake runs one way.
The moment habit stops matching your car is the moment it happens. Any vehicle that is new to you — hired, on loan as a courtesy car, or just bought. Two cars on one drive, one petrol, one diesel. The pumps in a different order on a familiar forecourt. A train to catch, and a hurried fill on the way to Grimsby Town. Years of petrol cars behind you, a diesel Renault Megane in front of you at the forecourt for its first tank — that's when. The hand repeats what it has always done when you add rain, a phone call or a back seat full of kids.
Next time you fill up in Littlefield: avoiding petrol in a diesel
- A green handle for unleaded and black for diesel is normal in the UK — but not on each forecourt. Trust the label on the pump, not the colour.
- Many vehicles state the fuel inside your filler flap or on the cap, and so check there on your first fill in any motor you do not know.
- One of each in the household? Mark your key to your diesel — a coloured fob, a sticker — since meaning to remember isn't enough.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the petrol pump. It sounds daft and it does the trick.
- Mistakes like this are straightforward to make while your mind is on something else, so your phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler built to reject a petrol nozzle, and add-on devices exist for cars without one. They are a safety net, not a reason to stop checking the petrol pump.
- Less petrol means a thinner mixture, and so stop as soon as you realise — while remembering that the next step is unchanged. It is still not to crank it.
Littlefield: already put petrol in a diesel?
Then, there's only a short order of things. Leave it unstarted, with your ignition switched off as well. If you are still at the forecourt — JET or anywhere else — ask the attendants to help you roll it clear of the petrol pump. Next, 0333 366 0103. We'll ask what was put in, about how much, and if it's been run.
Say so if it was AdBlue instead of petrol: it is a different problem, with its own page for Littlefield, since AdBlue brings corrosion and deposits instead of lost lubrication.
Why one petrol in a diesel task in Littlefield costs more than another
The four scenarios above are four different tasks, so no single quote for this would be honest. Mostly, the cost shifts with which situation you are in. Two things follow that: the petrol that was put in as a share of what the tank holds, then the place the vehicle is in and whether a van can reach it safely.
Ahead of any quote, not after, come three queries: your fuel that was put in, the quantity, and if it has run. That is why. A range turns into a straight figure once those answers are in.
About Littlefield itself
Littlefield is a suburban area located on the coast of Lincolnshire, with an elevation of approximately 3 metres above sea level. Littlefield sits near the cities of Kingston upon Hull and Grimsby, and is close to nearby places such as Yarborough and West Marsh. Littlefield has a population of around 7940 people, predominantly living in terraced housing. Littlefield is situated about 141.9 miles north of London, making it a relatively distant suburb from the capital city.
Across Lincolnshire and around Littlefield: fuel drain cover
Yarborough, Grange and West Marsh are among the locations around Littlefield that the same vans work, answering petrol in diesel call-outs across Littlefield's DN postcode area. A forecourt, a supermarket car park, a lay-by or your own drive are all spots our technicians work, and your car does not need to move to us.
Littlefield: still at the petrol pump?
Then, you couldn't be in a better spot. Keep the car switched off, then ring.