Spreakley: Petrol in a Diesel Car? How Worried to Be
Likely less than you are now — as long as nobody has started the car. Everyone in Spreakley starts with "have I ruined it?", and the fair answer is usually no: petrol resting inside the tank of any diesel remains harmless until priming, cranking or driving draws it into the system. Keep it that way: leave the engine off then ring Petrol in Diesel. Keep reading 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 repeat it.
Inside the motor: what petrol in a diesel really does
Two tasks fall to diesel on its journey through a motor. It ignites, and before it ignites it lubricates. The high-pressure pump and your injectors are made to very fine tolerances, and the diesel passing through them is what stops those surfaces from wearing against each other.
The second task petrol does not do at all, and the first it does poorly. Being less viscous than diesel, petrol strips away the protection a fuel system needs, so a pump on the mixture wearing itself. It's also made to resist igniting under compression — the opposite of what a diesel needs — which is why you get the clattering.
The shape of the trouble is plain when you put those together. Contact doesn't do the harm — circulation does. All a tank with petrol in it amounts to is a fuel problem. The beginning 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 fuel injectors beyond it.
Petrol in a diesel in Spreakley: how serious is it? Four situations
The best case there can be: filled up, not once started. Only that tank has petrol in it, and so the job is emptying the tank and flushing the fuel system where your car sits. This scenario can only truly occur on a forecourt: anywhere else, your car got there by being driven.
Ignition on, or started for a second. Petrol has left your tank and got to the filter and the fuel lines, because the fuel system has been bled. Drain, flush, deal with the filter: still usually straightforward.
Driven a few miles. Now your pump has spent those miles working on thinned fuel. How hard the vehicle was driven counts as much as how far, and the work takes in your tank, the fuel lines, the fuel filter and fresh fuel through the whole system. On the school run to St Mary's CofE Aided Infant School, Frensham, the miles is short. A run as far as Chichester, under 25 miles away, is a very different task. So is any distance on the M3, under 10 miles from Spreakley, where your engine has been running hard the whole time.
Clattering, an uneven idle, smoke, a throttle gone soft: driven till it complained. The motor is telling you the fuel is no longer behaving like diesel. Leave it where it stops: a lay-by, a side street, the verge on Hammondswood Road. What goes first is still the fuel drain and flush, and that deals with it, with long-term damage very unusual if a vehicle is stopped soon.
Petrol in a diesel myths Spreakley drivers hear
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. A bigger tank of the same mixture is all it gives, since topping up removes nothing. A diesel fuel system does not accept petrol by percentage in the way that guidance assumes.
"Newer diesels can handle a little petrol" — a myth, and closer to the opposite. A newer diesel sends its fuel through finer parts at higher pressure, which makes the protection count more, not less.
This is the one that catches drivers. Myth: "If it starts and drives, there's no damage done." The motorist of a petrol engine fed diesel normally stops, because it will not run, and the harm stops there. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually does; meanwhile your pump wears. 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 distinct issue. None of what petrol diluted is put back by it — and later, the tank still holds that petrol.
Myth: "Drain your tank yourself and you are sorted." After your engine has been run, some of the petrol is no longer in your tank: it's in your filter and the lines, and it goes right back through your pump at your next start. On top of that, petrol cleared into a can by the road is truly risky.
How does petrol in a diesel take place?
A careless moment is seldom the cause, and no one means to do it. A diesel nozzle generally will not fit a petrol car, but the slimmer petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one mistake simple, and just in one direction.
It happens when routine and the vehicle stop matching. A new car, a hire car or a courtesy car. One petrol and one diesel on the drive of the same household. A forecourt you know, but with its pumps laid out differently. A train to catch, and a rushed fill en route to Farnham. Precisely the moment it occurs: after years of driving petrol, someone fills a diesel Renault Clio for the first time. With rain, a call coming in, or children to deal with, your hand just does what it always has.
How to prevent petrol in a diesel at your next fill-up in Spreakley
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most usually do. Read the pump's label; the colour is only a hint.
- Plenty of vehicles state the fuel type inside the filler flap or on the cap, and so check there on the first fill in a car you don't know.
- Good intentions count for less than a sticker or a fob in a bright colour on the diesel's key when a household has one of each. So label it.
- Before the nozzle comes off the pump the first time you fuel a hired or new car, say "diesel" aloud. Silly, perhaps, yet it does the trick.
- Thinking about something else is when this becomes an easy mistake to make, so put the phone away then keep your mind on the pump.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to block a petrol nozzle, and aftermarket devices exist for the rest. Count it as a backstop, and keep reading the petrol pump.
- Stop as soon as you notice. Less petrol in the tank means a thinner mixture. It doesn't change what to do next, which is still not to start the vehicle.
Petrol already in a diesel around Spreakley? Begin here
Short and simple, then, is the order of things. Starting it is out, and so is turning on the ignition. Yet at the forecourt, at Shell or anywhere else? Ask the attendants to help you roll the vehicle away from the pump. Next, 0333 366 0103. We will ask what got in, about how much, and if it has been run.
If it was AdBlue and not petrol, say so. That is a different problem — corrosion and deposits rather than lost lubrication — and it has its own page for Spreakley.
Why one petrol in a diesel job around Spreakley costs more than another
Four separate tasks sit behind the four situations above — which is why there's no fair single price. What moves your cost is chiefly which of them you're in. The proportion matters next, meaning how much of your tank is petrol, and then the position of your car and whether getting to it is safe for our van.
Three questions come first, before any quote, rather than after — what got in, how much, has it run — and this is the reason. Those answers turn a range into a straight figure.
About Spreakley and its setting
Spreakley is a small hamlet situated on the riverside in Surrey, with an elevation of around 71 metres. Spreakley lies near the villages of Frensham and Lane End, and is also close to Shortfield Common. Spreakley is characterized by its predominantly detached housing stock, reflecting its rural setting. Spreakley is located approximately 37 miles from London, making it a relatively rural outpost in the South East region.
Fuel drain cover in Spreakley and across Surrey
Spreakley sits in the GU postcode area, and our vans that answer petrol in diesel call-outs there work the places around it as well — Frensham, Lane End and Shortfield Common among them. No need to bring your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations we drain.
Still at the petrol pump in Spreakley?
Then, you could not be in a better place. Turned off it remains; then call.