Should You Worry? Petrol in a Diesel Car in West Haddon
If it has not been started, worry far less than you likely are. Until the ignition primes your pump, the starter turns, or the vehicle is driven, petrol in a diesel tank just rests there and does no harm. Which makes the truthful reply to the first West Haddon question — "have I ruined it?" — normally no. To keep the vehicle like that, ring Petrol in Diesel and leave the motor switched off. Keep reading for three things: the effect petrol has inside a diesel motor, the clues of how far it has spread, and the way to make sure you never do it again.
Inside the motor: what petrol in a diesel really does
Diesel does two tasks on its way through an engine. It lubricates first, and after that does it burn. Designed to very fine tolerances, your injectors and the pump depend on your diesel flowing through them to stop their surfaces wearing against one another.
Of these two jobs, petrol handles the first badly and the second never. It is thinner than diesel and takes away the protection the system hinges 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 rattling comes from.
The shape of the problem is clear when you put those together. Contact doesn't do the damage — circulation does. Where that petrol is only in your tank, it's a problem of fuel, nothing more. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds travels on with your fuel to the injectors further on.
West Haddon, petrol in a diesel: four situations, from mild to serious
Filled up, and not started: no case is better. Being at a forecourt is what makes this possible: elsewhere, the car has been driven there to begin with. With that petrol kept in that tank alone, it's drained and purged on the spot, and nothing more is needed.
Started for a second, or only your ignition on. With the system primed, your lines and filter already hold petrol that came from that tank. That's normally still an easy task — a drain, a flush, and the fuel filter dealt with.
Driven a couple of miles. Now your pump has spent those miles working on thinned fuel. The work is the tank, the fuel lines, the filter and clean fuel through the whole system, and how hard the car was driven matters as much as how far. Driving the kids to West Haddon Endowed Church of England Primary School is one sort of trip. Any mileage on the M1, under 3 miles from West Haddon, means the motor has worked hard throughout, and a run to Coventry, under 25 miles away, makes a very different job too.
Driven on until it protested — rattling, smoke, a ragged idle, a soft throttle. What you are hearing is the engine signalling fuel that no longer acts like diesel. Leave it wherever it has stopped: a lay-by, a side street, the verge on High Street. What comes first is still the drain and flush, and that sorts it out, with long-term damage very uncommon if a car is pulled over soon.
Petrol in a diesel stories West Haddon people hear
Myth: "Fill it the rest of the way with diesel and it'll be fine." It will not. Nothing is removed by topping up — you're left with a fuller tank, still the same mix. That advice assumes a diesel fuel system handles petrol by percentage. It does not.
Myth: "A current diesel can cope with a bit of petrol." If anything, the reverse. At higher pressure, through more precise parts: that's how a newer diesel handles its fuel, and so the lubrication counts more, not less.
Myth: "If it starts and drives, there is no damage done." This is the one that catches people. Feed diesel to a petrol motor and it normally will not run, so the motorist stops — and the damage stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually will; meanwhile your pump grinds. Fine and running are not the same at all.
Myth: "Add some two-stroke oil and drive the vehicle home." It is an old fix for a separate fault. What petrol has thinned stays thinned, and the petrol stays inside the tank regardless.
The next start sends petrol back round your pump from the lines and your filter, where some of that sits once the engine has been run. That's why draining the tank yourself doesn't sort it — a myth. Besides, petrol drained into a can by the road is genuinely hazardous.
How does petrol in a diesel take place?
It is seldom carelessness, and nobody does it on purpose. The forecourt makes it simple: the petrol nozzle is the slimmer of the two, and it slips into a diesel filler with almost no resistance, whilst a diesel nozzle generally won't go into a petrol motor at all. So the slip runs one way.
The moment routine stops matching the car is the moment it occurs. Any vehicle that is new to you — hired, on loan as a courtesy car, or just bought. One petrol and one diesel on the driveway of the same household. A forecourt you know, only with its pumps arranged differently. A train to catch, and a hurried fill en route to Long Buckby. Exactly the moment it happens: after years of driving petrol, a driver fills a diesel Volkswagen Golf for the first time. With rain, a call arriving, or children to deal with, the hand just does what it has always done.
Next time you fill up in West Haddon: preventing petrol in a diesel
- Not every forecourt in the UK keeps to green for unleaded and black for diesel, even if most usually do. Check the petrol pump's label; the colour is just a hint.
- In a car you don't know, look inside the flap over your filler or at the cap before your first fill: plenty of cars state the fuel type there.
- A coloured fob or a sticker on the diesel's key does more than any amount of intending to remember, for a home with one of each.
- Before the nozzle comes off the petrol pump the first time you fill a hired or new motor, say "diesel" out loud. Silly, yes, but it does the trick.
- Tuck the phone away. This is an easy mistake to make while you are thinking about something else.
- Some diesels have a filler designed to reject a petrol nozzle, and devices you can add exist for motors without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the pump.
- Less petrol makes a thinner mixture, so stop as soon as you realise — while remembering that your next step is unchanged. It's still not to fire it up.
Put petrol in a diesel in West Haddon already?
The order of things is brief, then. Starting it is out, and so is turning on your ignition. The attendants at the forecourt — whether at BP itself or wherever you filled up — will usually help roll it away from the petrol pump if you ask. What went in, roughly how much, and whether it has run: tell us that when you call 0333 366 0103.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a different problem — West Haddon has a page just for it.
Why one petrol in a diesel task around West Haddon costs more than another
Four different tasks sit behind the four scenarios above — which is why there is no honest single price. Mostly, your cost moves with which one you're in. Two things follow that: the petrol that went in as a proportion of what that tank takes, then the place your car is in and whether a technician can get to it safely.
That's why our technicians ask three queries before costing instead of after: what got in, how much, and whether it's run. Those answers turn a range into a straight figure.
About West Haddon itself
West Haddon is a village in Northamptonshire, situated in the East Midlands region of England, with a population of around 1985 people. West Haddon sits at an elevation of 175 metres, approximately 70 miles northwest of London, and is characterized by its predominantly detached housing stock. West Haddon is located near several other villages, including Winwick, Ravensthorpe, and Watford, and is around 19 miles southeast of Coventry. West Haddon remains a rural community with a strong sense of identity.
Across Northamptonshire and in West Haddon: fuel drain cover
Petrol in diesel calls around West Haddon — part of the NN postcode area — go to teams that likewise cover the locations round it, Winwick, Ravensthorpe and Watford among them. A forecourt, a supermarket car park, a lay-by or your own drive are all places our engineers drain, and the car does not need to move to us.
At the petrol pump in West Haddon, right now?
Nothing beats it: that is where you now are. Leave the vehicle switched off, and ring.