Petrol in a Diesel Car in Whitemans Green: How Worried Should You Be?
Likely less than you are now — provided no one has started it. Till your ignition primes your pump, the starter cranks, or your vehicle is driven, petrol in a diesel tank simply sits there and does no harm. Which makes the truthful reply to that first Whitemans Green query — "have I ruined it?" — usually no. Petrol in Diesel is who to ring, with your motor left off, and so it stays that way. Further down, this page sets out what petrol really does inside a diesel, how far it may have gone, and how to stop it happening to you a second time.
Inside the motor: what petrol in a diesel really does
Passing through a motor, diesel does two jobs at once. It protects to begin with, and only then does it burn. Your high-pressure pump and your injectors are made 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 manages the first badly and the second not at all. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, so a pump running on the mixture wearing itself. It is also made to resist igniting under compression — the opposite of what a diesel needs — which is where you hear the knocking.
Taken together, they show what shape the problem takes. The harm is done by movement, not by contact. Any tank with petrol in it is a fuel problem. A pump that has been working on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with the fuel to the injectors further on.
How bad is petrol in a diesel? Four scenarios our technicians see around Whitemans Green
The best case there is: filled up, not once started. Just that tank has petrol in it, so the job is clearing that tank and cleaning the system where the vehicle stands. This scenario can only truly occur on a forecourt: anywhere else, the vehicle got there by being driven.
A moment's running, or merely your ignition on. Petrol has left that tank and got to the filter and your lines, because your system has been bled. Usually little more than draining, rinsing and seeing to your filter, so still straightforward.
Those few miles on the road meant your pump running on fuel thinned by petrol the whole way. The work is that tank, your lines, the fuel filter and fresh fuel through the entire circuit, and how hard your car was driven counts as much as how far. Driving the kids to Holy Trinity Church of England Primary School, Cuckfield is one sort of trip. A run as far as Brighton and Hove, under 15 miles away, is a very different task. So is any miles on the M23, under 10 miles from Whitemans Green, where the motor has been running hard throughout.
Clattering, a lumpy idle, smoke, a throttle gone soft: driven until it complained. The engine is telling you your fuel is no longer behaving like diesel. Whether it is the verge on Ardingly Road, a lay-by or a side street, stop there and leave it. The drain and flush-through still go first, and they sort it out: when a car is pulled over quickly, long-term damage is very uncommon.
Stories Whitemans Green people hear about petrol in a diesel
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Topping up takes out nothing; it gives you a fuller tank of the same mix. A diesel fuel system doesn't tolerate petrol by percentage in the way that guidance assumes.
If anything, the reverse holds. Myth: "A modern diesel can cope with a bit of petrol." At higher pressure, through finer components: that is how a modern diesel handles its fuel, and so the lubrication matters for more, not less.
Myth: "If it starts and drives, there is no harm done." This is the one that fools people. A petrol engine fed diesel generally will not run, so the driver stops and the harm stops with them. A diesel fed petrol generally starts, ticks over and drives away as though nothing has happened, while the pump grinds. Running doesn't mean fine.
An old fix for a separate issue is behind this one. Myth: "Add some two-stroke oil and drive the car home." What petrol has thinned stays diluted, and the petrol remains in that tank regardless.
"Drain it yourself and you're sorted" — a myth, because after it's been running some petrol sits in the filter and lines, waiting to go right back through your pump on your next start. Besides, petrol drained into a can by the road is truly risky.
How petrol ends up: petrol in a diesel
No one does it on purpose, and it's seldom carelessness. One way only, since of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one mostly won't fit a petrol car. That's how the forecourt makes it straightforward.
It occurs when habit and the vehicle stop matching. A new motor, a hire car or a courtesy car. One petrol and one diesel on the drive of the same household. A well-known forecourt with the pumps in a different order. A train to catch, and a rushed fill on the way to Haywards Heath. A new-to-you diesel Renault Clio, its first fuelling, and a driver accustomed to petrol: exactly when it happens. With rain, a call arriving, or children to deal with, your hand simply does what it always has.
Whitemans Green drivers: how to avoid petrol in a diesel next time
- Check the petrol pump, not the colour. In the UK unleaded handles are generally green and diesel black, but not on every forecourt. The label is what counts.
- Plenty of motors state the fuel type inside your filler flap or on the cap, so check there on the first fill in a car you don't know.
- Mark your key. In a house with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of intending to remember.
- 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 seems daft and it does the trick.
- Put your 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 designed to reject a petrol nozzle, and add-on devices exist for the rest. Treat it as a safety net, and keep reading the pump.
- Less petrol means a thinner mix, so stop as soon as you realise — though remembering that your next step is unchanged. It is still not to fire it up.
Put petrol in a diesel in Whitemans Green already?
Short and simple, then, is the order of things. Do not start it, and do not switch your ignition on. Still on the forecourt, at Esso or anywhere else? Ask the attendants to help you roll the vehicle away from the pump. Then phone 0333 366 0103 and tell us what went in, roughly how much, and whether it has run.
Corrosion and deposits form the problem with AdBlue, whereas petrol brings lost protection. So if it was AdBlue, say so — and read its own Whitemans Green page.
What makes one Whitemans Green petrol in a diesel task cost more than the next
Four separate jobs sit behind the four situations above — which is why there's no fair single quote. Mostly, your cost shifts with which situation you're in. After that it's the proportion — how much petrol got in against how much your tank holds — and then where your car is and whether a technician can get to it safely.
That's why our technicians ask three questions before quoting instead of after: what was put in, how much, and if it's run. With those replies, you get a straight figure instead of a range.
About Whitemans Green itself
Whitemans Green is a suburban area in West Sussex, situated near the River Adur and characterised by its detached housing stock. Whitemans Green sits at an elevation of 117 metres, overlooking the surrounding countryside. Whitemans Green is located near several other small settlements, including Cuckfield and Tylers Green, and is within commuting distance of Brighton and Hove. Whitemans Green has a population of approximately 1905 residents.
Fuel drain cover around Whitemans Green and across West Sussex
Our vans answering petrol in diesel call-outs in Whitemans Green, in the RH postcode area, also work the locations near it, Cuckfield, Brook Street and Tylers Green included. The car does not need to come to us: our engineers drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
Still at the petrol pump in Whitemans Green?
Then you're in the best position there can be. Switched off it remains; then phone.