Petrol in a Diesel Car in Lane Ends: How Worried Should You Be?
If it has not been started, worry far less than you likely are. Until the ignition primes the pump, your starter cranks, or your car is driven, petrol in a diesel tank just rests there and does nothing. Which means the truthful reply to that first Lane Ends query — "have I ruined it?" — normally no. To keep it that way, phone Petrol in Diesel then leave your engine alone. The rest of this page covers what petrol really does to a diesel, how to tell how far it has got, and how to make sure it does not happen to you again.
Petrol in a diesel: what does it do to your engine?
Passing through a motor, diesel is doing two jobs at once. It protects first, and after that does it burn. Very fine tolerances go into the fuel injectors and the high-pressure pump, and only your diesel running through keeps their surfaces from grinding together.
Petrol handles the first job poorly and the second not at all. It's runnier than diesel and removes the lubrication the system rests on, and so a pump running on a petrol mix 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 is where the clattering comes from.
The shape of the issue is plain once you put those together. It is circulation that causes the harm, not contact. Petrol in a tank is a fuel fault. A pump that has been labouring on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with the fuel to the fuel injectors downstream.
Four scenarios our technicians see around Lane Ends: how bad is petrol in a diesel?
The best case there is: filled up, never started. Just that tank has petrol in it, so the job is draining the tank and purging the system where your car sits. This scenario can only really happen at a forecourt: anywhere else, the vehicle got there by being driven.
A moment's running, or merely your ignition on. The system has been primed, and so petrol has left the tank and got to the filter and your lines. Still normally easy: drain, flush, and the filter dealt with.
The pump has worked a few miles on thinned fuel — that's what driving the vehicle does. Tank, lines, filter, then clean fuel run through the whole system: that's this work, and the way the car was driven counts as much as the miles. Short trips, like the school run to Greave Primary School, are one matter. A run as far as Manchester, under 10 miles away, is a very different task. So is any miles on the M60, under 3 miles from Lane Ends, where the motor has been working hard the whole time.
It complained, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone uneven. The motor is telling you your fuel is no longer acting like diesel. Whether it is the verge on Sandy Lane, a lay-by or a side street, stop there and leave it. The fuel drain and flush still go first, and they deal with it: when a vehicle is stopped quickly, lasting damage is very unusual.
Lane Ends people and the petrol in a diesel stories they hear
False: topping up to full with diesel makes it fine. It does not. A bigger tank of the same mixture is all it gives, because topping up removes nothing. Percentage is not how a diesel fuel system copes with petrol, however much that advice presumes.
"Newer diesels can handle a little petrol" — a myth, and nearer the opposite. At higher pressure, through finer parts: that is how a current diesel moves its fuel, so the protection matters for more, not less.
"It starts, it drives, so there is no harm" — the myth that trips up more drivers than any other. Feed diesel to a petrol motor and it generally won't run, and so the motorist stops — and the damage stops with them. Feed petrol to a diesel and it generally starts, idles and drives away like nothing has happened — all the while its pump wears. Being able to run isn't the same as being fine.
Not so: a two-stroke additive lets you to drive home. It is an old fix, supposed for another fault. That petrol is still inside your tank afterwards, and what it has thinned is not put back.
"Drain it yourself and you're sorted" — a myth, since after it has been running some petrol lies in the fuel filter and lines, waiting to go right back through the pump on the next start. Emptying petrol into a can at the kerbside is also genuinely hazardous.
Why petrol in a diesel occurs at all
It is seldom carelessness, and nobody does it on purpose. The petrol nozzle is the slimmer of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly will not go into a petrol vehicle at all. The forecourt makes it easy, and the error runs one way.
It takes place when habit and your car stop matching. A new motor, a hire car or a courtesy car. A household with one petrol and one diesel on the drive. A forecourt you know, but with its pumps arranged differently. Rushing for a train at Romiley and filling up en route. Exactly the moment it happens: after years of driving petrol, a driver fills a diesel Renault Clio for the first time. Add rain, a phone call or a back seat full of children, and your hand does what it has always done.
How to prevent petrol in a diesel at your next fill-up in Lane Ends
- Green for unleaded and black for diesel is normal in the UK — yet not on each forecourt. Trust the label on the pump, not the colour.
- Many cars state the fuel inside the filler flap or on the cap, so check there on your first fill in any vehicle you do not know.
- Mark the 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.
- Before the nozzle leaves the petrol pump the first time you fuel a hired or new vehicle, say "diesel" out loud. Silly, yes, yet it does the trick.
- Mistakes like this are straightforward to make while your mind is on something else, and so the phone goes away.
- Add-on devices are available for motors without one, and some diesels come with a filler that will not accept a petrol nozzle. Useful — but a safety net only, never a reason to stop checking the label.
- Noticing it mid-fill? Stop at once. A thinner mix follows from less petrol in the tank, but your next stage stays the same: do not start it.
Already put petrol in a diesel in Lane Ends?
The order of things is short, then. Don't turn your ignition on, and don't fire it up. Yet at the forecourt, at Esso or anywhere else? Ask the attendants to help you push it clear of the petrol pump. Phone 0333 366 0103 next, with three facts — your fuel, the rough quantity, and whether it has run.
Say so if it was AdBlue instead of petrol: it is a separate issue, with its own page for Lane Ends, because AdBlue brings corrosion and deposits instead of lost lubrication.
What makes one Lane Ends petrol in a diesel job cost more than the next
Four different jobs sit behind the four situations above — which is why there is no honest single price. Chiefly, the cost shifts with which one you're in. Two things follow that: the petrol that got in as a share of what that tank holds, then the place the car is in and whether a technician can reach it safely.
Three questions come first, before any quote, instead of after — what went in, how much, has it run — and this is the reason. With those replies, there is a straight figure instead of a range.
About Lane Ends, briefly
Lane Ends is a suburban area in Greater Manchester, situated approximately 7.8 miles from Manchester city centre. Lane Ends has a population of around 3552 people and is characterised by semi-detached housing. Lane Ends is located near other local places such as Greave, Top-o-th Hill, and Romiley, in the inland area of the North West region. Lane Ends sits at an elevation of 151 metres, relatively close to the urban hub of Manchester.
Fuel drain cover across Greater Manchester, Lane Ends included
The vans answering petrol in diesel call-outs in Lane Ends, in the SK postcode area, also work the spots around it, Greave, Top-o-th Hill and Romiley included. No need to bring your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all places where we work.
Still at the petrol pump around Lane Ends?
The best place there is, then — that's where you are. Keep the vehicle turned off, and ring.