Petrol in a Diesel Car in Little London: How Worried Should You Be?
If it hasn't been started, worry far less than you likely are. "Have I wrecked it?" is the first thing everyone around Little London asks, and the truthful answer is generally no, since petrol left in a diesel tank harms nothing till it's drawn through the fuel system — by ignition priming, by the starter, or by being driven. Petrol in Diesel is who to phone, with the motor kept off, so it remains that way. Below, you will find what petrol actually does inside a diesel, how far it might have got, and how to stop it happening to you again.
Petrol in a diesel: what does it do to the engine?
Two jobs fall to diesel on its route through a motor. Before it ignites, it protects — then it ignites. The high-pressure fuel pump and the fuel injectors are designed to very fine tolerances, and the diesel passing through them is what keeps those surfaces from grinding against each other.
Of those two tasks, petrol handles the first badly and the second never. The clattering comes from petrol being designed not to ignite when compressed, which is exactly the reverse of what a diesel needs. On top of that it is thinner than diesel, it strips out the lubrication the system rests on, and any pump running on such a mixture is wearing itself.
The shape of the problem is clear when you put those together. Contact doesn't do the damage — movement does. All a tank with petrol in it amounts to is a fuel issue. Whatever a worn pump sheds travels on, carried by the fuel, into your injectors downstream, which is why a pump that has worked on that petrol is where a mechanical problem starts.
Little London, petrol in a diesel: four cases, from mild to significant
The best case there is: filled up, never started. At a forecourt, and really only there, that petrol is still confined to the tank — since everywhere else your car was driven to reach it. The task is draining and cleaning on the spot.
A moment's running, or merely the ignition on. With the fuel system primed, the fuel lines and filter now hold petrol that has come from your tank. Drain, flush, see to the filter: still normally straightforward.
Those few miles on the road meant the pump running on fuel thinned by petrol the whole way. The work is that tank, the lines, your filter and fresh fuel through the whole system, and how hard the car was driven counts as much as how far. Driving the kids to The Spalding St John the Baptist Church of England Primary School is one kind of trip. Any miles on the A1(M), under 25 miles from Little London, means your engine working hard throughout, and a run to Peterborough, under 15 miles away, makes a very different job too.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone uneven. The engine is telling you your fuel is no longer acting like diesel. Stop where you are — on the verge on Aintree Drive, at the kerb, down a side road — and do not move it again. The fuel drain and flush still go first, and they sort it out: if a vehicle is pulled over soon, permanent damage is very uncommon.
Myths Little London drivers hear about petrol in a diesel
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. Topping up removes nothing; it gives you a bigger tank of the same mix. A diesel fuel system does not accept petrol by percentage in the way that guidance presumes.
Not so: a current diesel copes with a bit of petrol. Rather, the opposite. At higher pressure, through finer components: that's how a current 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 fools drivers. The driver of a petrol engine fed diesel usually has no choice but to stop, since it will not run, and the damage stops there. Feed petrol to a diesel and it normally fires up, idles and pulls away as if nothing happened — all the while its pump is wearing. Being able to run is not the same as being fine.
An outdated workaround for a different issue lies behind this one. Myth: "Add some two-stroke oil and drive it home." That petrol is still inside your tank afterwards, and whatever it has thinned is not put back.
Myth: "Drain your tank yourself and you're sorted." After your engine has run, some of the petrol is no longer inside the tank: it is in the fuel filter and the lines, and it goes right back through the pump on the next start. Besides, petrol drained into a can by the road is genuinely dangerous.
How does petrol in a diesel occur?
On purpose? Never. Through carelessness? Seldom, if ever. The petrol nozzle is the smaller of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly won't go into a petrol motor at all. The forecourt makes it easy, and the error runs one way.
When routine and the vehicle stop matching, it takes place. A motor that's new to you — hired, on loan as a courtesy car, or brand new. A household with one petrol and one diesel on the driveway. The pumps in a different order on a familiar forecourt. A rushed fill en route to Spalding with a train to catch. Years of petrol vehicles behind you, a diesel Renault Megane in front of you on the forecourt for its first tank — that is when. The hand does what it has always done when you add rain, a phone call or a back seat full of children.
Little London motorists: how to prevent petrol in a diesel next time
- Read the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, but not on each forecourt. The label is what matters.
- Plenty of cars state the fuel type inside the filler flap or on the cap, so check it on the first fill in any car you do not know.
- One of each in the household? Mark your key to your diesel — a bright fob, a sticker — because meaning to remember is not enough.
- Before the nozzle comes off the pump the first time you fill a hired or new vehicle, say "diesel" aloud. Silly, yes, yet it does the trick.
- Thinking about something else is when this becomes an easy mistake to make, and so put your phone away then keep your mind on the pump.
- Some diesels have a filler designed to reject a petrol nozzle, and devices you can add exist for motors without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop reading the pump.
- The moment you notice, stop: less petrol in that tank makes a thinner mixture. What to do next does not change, though — still don't fire it up.
Already put petrol in a diesel around Little London?
Short and simple, then, is the order of things. Never crank it, and do not switch the ignition on. The staff on the forecourt — whether at Essar itself or wherever you filled up — will normally help roll it away from the pump if you ask. Ring 0333 366 0103 next, with three answers — the fuel, the approximate quantity, and whether it's run.
If it was AdBlue rather than petrol, say so. That is a different issue — corrosion and deposits rather than lost protection — and it has its own page for Little London.
Why one petrol in a diesel task around Little London costs more than another
The four scenarios above are four separate jobs, so no single price for this would be fair. The scenario itself does most of the work of moving the cost. Next it is the ratio — how much petrol went in against how much your tank takes — and then where the vehicle is and whether a van can get to it safely.
Ahead of any quote, not after, we ask three queries: the fuel that got in, its volume, and if it has run. That's why. Their replies are what turn a range into one firm number.
About Little London itself
Little London is a suburban area in Lincolnshire, situated on the riverside with an elevation of around 5 metres. Little London lies near Clay Lake and the town of Spalding, and is close to Pode Hole. Little London has a population of approximately 2144 people and is characterised by predominantly detached housing.
Fuel drain cover across Lincolnshire, Little London included
Little London waits in the PE postcode area, and our teams that answer petrol in diesel calls there work the spots near it as well — Clay Lake, Spalding and Pode Hole among them. No need to move the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all locations where we work.
Still at the pump in Little London?
Then you are in the best position there is. Turned off it remains; then phone.