How Worried Should You Be? Petrol in a Diesel Car in Coltishall
Probably less than you already are — as long as nobody has started the vehicle. Everyone in Coltishall starts with "have I ruined it?", and the honest answer is generally no: petrol left in that tank of a diesel stays harmless till priming, cranking or driving pulls it into your fuel system. To keep the vehicle that way, ring Petrol in Diesel and leave the engine switched off. Read on for three things: the effect petrol has inside a diesel engine, the clues of how far it has spread, and the way to make sure you don't do it again.
Your engine and petrol in a diesel: what happens
Diesel has two jobs on its way through a motor. Before it combusts, it lubricates — and then it combusts. Your high-pressure pump and the injectors are made to very fine clearances, and the diesel passing through them is what stops those surfaces from wearing down against one another.
Of those two tasks, petrol handles the first badly and the second never. The knocking comes from petrol being made not to ignite when compressed, which is precisely the reverse of what a diesel needs. On top of that it is runnier than diesel, it strips away the protection the system hinges on, and any pump working on that mix is wearing itself.
Combined, those leave the shape of the problem plain. Not contact but movement is what causes the harm. Where that petrol is only in your tank, it's a fault of fuel, nothing more. Once the pump has been running on that petrol, a mechanical issue has started: anything shed by a pump that's wearing travels onward to the injectors with your fuel.
Petrol in a diesel in Coltishall: how serious is it? Four situations
The best case there can be: filled up, not once started. That petrol is in your tank and just your tank, and the task is a drain and a flush where your car sits. This is the one situation that can only really happen at a forecourt, because anywhere else the vehicle has been driven to get there.
Started for a second, or just the ignition on. Once primed, the fuel system has drawn petrol out of that tank as far as the fuel filter and your lines. Drain, flush, see to the fuel filter: still usually simple.
The pump now worked a couple of miles on weakened fuel — that is what driving the vehicle does. Distance is only half of that; how hard it was driven matters just as much. Either way this work includes that tank, your lines, your filter and fresh fuel through the whole circuit. On the school run to Coltishall Primary School, the distance is short. A run as far as Norwich, under 10 miles away, is a very different task. So is any distance on the M11, over 50 miles from Coltishall, where the motor has been running hard throughout.
Driven until it complained. Clattering, a ragged idle, smoke, a throttle that has gone soft. That is your engine telling you its fuel no longer is behaving like diesel. Pull up on the spot — on the verge on Church Street, at the kerb, down a side road — and don't move it again. Lasting damage is very rare when a vehicle is pulled over early, and the drain and flush that still go first deal with it.
Coltishall people and that petrol in a diesel myths they hear
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing is removed when you top up — that tank just holds more of the same mixture. Percentage is not how a diesel fuel system tolerates petrol, whatever that advice presumes.
If anything, the opposite is true. Myth: "A modern diesel can cope with a bit of petrol." A modern diesel sends its fuel through more precise parts at higher pressure, which makes the lubrication matter more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that fools drivers. The motorist of a petrol engine fed diesel normally stops, since it will not run, and the damage stops there. A diesel fed petrol usually starts, idles and drives away as if nothing has happened, whilst your pump grinds. A running engine doesn't mean fine.
Myth: "Add some two-stroke oil and drive it home." It is an old fix for a distinct problem. That petrol is still in the tank afterwards, and whatever it has weakened isn't put back.
"Drain it yourself and you are sorted" — a myth, because after it's been running some petrol lies in the fuel filter and lines, waiting to go straight back through the pump on the next start. Clearing petrol into a can at the roadside is also truly hazardous.
How petrol ends up: petrol in a diesel
It's rarely carelessness, and no one does it on purpose. The forecourt makes it simple: the petrol nozzle is the narrower of the two, and it slips into a diesel filler with almost no resistance, while a diesel nozzle generally won't go into a petrol motor at all. So the slip runs one way.
When habit and your car stop matching, it takes place. Courtesy car, hire car, or a car that is brand new. Two motors on one drive, one petrol, one diesel. Your ordinary forecourt, its pumps suddenly in a different order. Filling up in a hurry on the way to Hoveton & Wroxham, with a train to catch. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is precisely the moment it occurs. Add a back seat full of children, a phone call or rain, and the hand takes over.
Coltishall motorists: how to avoid petrol in a diesel next time
- Read the pump, not the colour. In the UK unleaded handles are generally green and diesel black, but not on every forecourt. The label is what matters.
- Plenty of cars state the fuel inside the filler flap or on the cap, so check it on the first fill in a car you don't know.
- Mark the key. In a home with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember.
- Before the nozzle comes off the petrol pump the first time you fill a hired or new car, say "diesel" aloud. Daft, perhaps, yet it works.
- While you are thinking about something else, this is an easy mistake to make — so put your phone away.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler designed to reject a petrol nozzle, and add-on devices exist for the remainder. Count it as a backstop, then keep checking the pump.
- Less petrol means a weaker mix, and so stop the moment you notice — while remembering that the next step is unchanged. It's still not to fire it up.
Put petrol in a diesel in Coltishall already?
Then, there is only a short order of things. Leave it unstarted, with the ignition off too. Ask the attendants to help you push it clear of the petrol pump if you are still on the forecourt, whether that's Esso or somewhere else. What went in, roughly how much, and whether it has run: tell us those when you call 0333 366 0103.
Say so if it was AdBlue instead of petrol: it is a different problem, with its own page for Coltishall, because AdBlue brings corrosion and deposits rather than lost protection.
One petrol in a diesel job around Coltishall costs more than another. Why?
There is no honest single quote for this, since the four situations above are four separate jobs. What moves your cost is chiefly which of them you are in. Where your car is counts too, and whether a technician can safely reach it, after the share of petrol to what the tank takes.
Three questions come first, before quoting, rather than after — what got in, how much, has it run — and that is the reason. A range becomes a straight figure once those answers are in.
About Coltishall and its setting
Coltishall is a village situated on the River Bure in Norfolk, with a low elevation of around 7 metres above sea level. Coltishall lies approximately 7 miles north of Norwich and 105 miles northeast of London, in a rural area surrounded by nearby villages such as Horstead and Great Hautbois. Coltishall has a mix of old and new properties, but predominantly features detached housing. Coltishall remains a small, quiet community with a population of around 1367 residents.
Across Norfolk and around Coltishall: fuel drain cover
Coltishall waits in the NR postcode area, and our vans that answer petrol in diesel calls there work the locations near it as well — Horstead, St James and Great Hautbois among them. Our technicians drain wherever your vehicle is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
In Coltishall and still at the petrol pump?
Nothing beats it: that is where you now are. Turned off it remains; then phone.