Petrol in a Diesel Car in Stow cum Quy: How Worried Should You Be?
Not started? Then less worried than you likely feel. Everyone in Stow cum Quy begins with "have I wrecked it?", and the fair answer is normally no: petrol resting inside the tank of a diesel stays harmless till priming, cranking or driving pulls it into your fuel system. Leave the motor off then call Petrol in Diesel — that is how you keep it that way. Read on 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 do it again.
Inside the motor: what petrol in a diesel really does
Diesel has two tasks on its way through an engine. It protects first, and only then does it burn. Built to extremely fine clearances, the fuel injectors and the pump depend on the diesel flowing through them to keep their surfaces from wearing against one another.
Badly at the first, not at all at the second: that is petrol. It's runnier than diesel and removes the lubrication the fuel system rests on, and so a pump running on a petrol mixture 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.
The shape of the issue is plain once you put those together. The damage is done by circulation, not by contact. Petrol in a tank is a fuel issue. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with the fuel to the fuel injectors further on.
Four situations we see around Stow cum Quy: how bad is petrol in a diesel?
Fuelled but never started — as good as it gets. Only your tank has petrol in it, and so the job is clearing your tank and cleaning the fuel system where the vehicle sits. This situation can only truly take place on a forecourt: anywhere else, the car got there by being driven.
Your ignition turned on, or a short start. With the fuel system primed, the lines and filter now hold petrol that has come from the tank. That's normally still a straightforward task — a drain, a flush, and the fuel filter dealt with.
The pump now spent a few miles on thinned fuel — that is what driving the car meant. The work is your tank, the fuel lines, the filter and fresh fuel through the entire circuit, and how hard your car was driven matters as much as how far. Driving the children to Bottisham Community Primary School is one sort of trip. Any distance on the M11, under 10 miles from Stow cum Quy, means the motor working hard throughout, and a run to Cambridge, under 5 miles away, makes a very different job too.
Knocking, a ragged idle, smoke, a throttle gone soft: driven till it complained. The fuel isn't behaving like diesel any more, and your engine is saying so. Pull up on the spot — on the verge on Stow Road, at the kerb, down a side road — and do not move it again. A car stopped soon very seldom has lasting damage, as the drain and the flush, which still go first, deal with it.
Myths Stow cum Quy people hear about petrol in a diesel
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. A bigger tank of the same mix is all it gives, since topping up removes nothing. A diesel fuel system doesn't accept petrol by percentage in the way that advice presumes.
"Current diesels can handle a little petrol" — a myth, and nearer the reverse. Protection counts more on modern diesels, not less, since their fuel passes through finer parts at higher pressure.
Myth: "If it starts and drives, there is no damage done." This is the one that catches people. Diesel in a petrol motor generally means a motor that will not run: the driver stops, and so does the harm. A diesel fed petrol generally starts, ticks over and drives away as though nothing has happened, whilst the pump wears. A running engine doesn't mean fine.
Myth: "Add some two-stroke oil and drive the car home." It's an old fix for a different fault. It doesn't put back what petrol has weakened, and the petrol is still inside your tank afterwards.
"Drain it yourself and you're sorted" — a myth, since after it's been running some petrol lies in your filter and lines, ready to go straight back through the pump at the next start. Draining petrol into a can at the roadside is also genuinely hazardous.
Petrol in a diesel: how does it take place?
A careless moment is seldom the cause, and no one means to do it. The forecourt makes it easy: the petrol nozzle is the slimmer of the two, and it slips into a diesel filler with almost no resistance, whilst a diesel nozzle mostly won't go into a petrol car at all. So the slip runs one way.
When routine and your car stop matching, it happens. Any car that is new to you — a hire car, on loan as a courtesy car, or brand new. One petrol and one diesel on the driveway of the same household. Your usual forecourt, its pumps suddenly in a different order. Filling up in a rush en route to Cambridge North, with a train to catch. Exactly the moment it happens: after years of driving petrol, someone fills a diesel Volkswagen Golf for the first time. With rain, a call arriving, or children to deal with, your hand just does what it has always done.
Avoiding petrol in a diesel next time you fill up in Stow cum Quy
- Green for unleaded and black for diesel is normal in the UK — but not on every forecourt. Go by the label on the petrol pump, not the colour.
- In a motor you don't know, look inside the flap over the filler or at the cap before the first fill: many cars state the fuel type there.
- One of each in the household? Label your key to the diesel — a coloured fob, a sticker — because meaning to remember isn't enough.
- It seems silly and it works: on your first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump.
- Whilst you're thinking about something else, this is an easy mistake to make — so tuck your phone away.
- Some diesels have a filler designed to refuse a petrol nozzle, and devices you can add exist for cars without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the petrol pump.
- Stop the moment you notice. Less petrol inside that tank means a weaker blend. It doesn't change what to do next, which is still not to crank it.
Petrol already in a diesel around Stow cum Quy? Start here
Then the order of things is brief. Leave it unstarted, with the ignition off too. Ask the attendants to help you roll it away from the pump if you are still on the forecourt, whether that is Teversham Motors or anywhere else. Then call 0333 366 0103 and tell us what went in, roughly how much, and if it has run.
Say so if it was AdBlue rather than petrol: it is a different fault, with its own page for Stow cum Quy, since AdBlue brings corrosion and deposits instead of lost lubrication.
Stow cum Quy petrol in a diesel tasks: why one costs more than another
The four scenarios above are four different tasks, so no single price for this would be fair. Mostly, the cost shifts with which situation you're in. Two things come after that: the petrol that went in as a share of what that tank takes, then the spot the car is in and whether our van can get to it safely.
That is why we ask three queries before quoting instead of after: what got in, how much, and if it's run. A range turns into a straight figure once those replies are in.
About Stow cum Quy
Stow cum Quy is a small village in Cambridgeshire, situated on the River Cam and characterised by semi-detached housing. Stow cum Quy lies close to the city of Cambridge, with Quy Waters and Frog End nearby. Stow cum Quy has a population of around 545 residents and is located at an elevation of 17 metres, making it a low-lying riverside community. Stow cum Quy is also near the village of Bottisham, and is within commuting distance of London, 51.5 miles to the south.
Fuel drain cover around Stow cum Quy and across Cambridgeshire
The teams answering petrol in diesel calls around Stow cum Quy, in the CB postcode area, also work the places near it, Quy Waters, Frog End and Bottisham included. No need to move the car to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations where we work.
In Stow cum Quy and still at the pump?
No position is better: that's where you now are. Keep it off. Phone.