How Worried Should You Be? Petrol in a Diesel Car in Wecock
If it has not been started, worry far less than you probably are. Everyone around Wecock begins with "have I wrecked it?", and the fair answer is generally no: petrol resting inside your tank of a diesel remains harmless until priming, cranking or driving pulls it into your fuel system. Keep it like that: leave your engine off and phone Petrol in Diesel. Further down, you will find what petrol really does inside a diesel, how far it may have got, and how to stop it happening to you again.
What petrol in a diesel does to the motor
Diesel does two jobs on its way through an engine. Before it burns, it lubricates — then it ignites. Very fine tolerances are built into your injectors and your high-pressure pump, and only your diesel flowing through keeps those surfaces from grinding together.
Poorly at the first, not at all at the second: that is petrol. A pump running on a petrol mix is wearing itself out, because petrol is runnier than diesel and takes away the protection your fuel system depends on. Petrol is also designed to resist igniting under compression — the opposite of what a diesel needs from its fuel — and that is where any clattering comes.
Taken together, they make clear what shape the trouble has. Contact does not do the damage — movement does. All a tank with petrol in it amounts to is a fuel fault. A pump that has been running on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with your fuel to the injectors downstream.
Wecock, petrol in a diesel: four situations, from mild to major
Filled but not once started — as good as it gets. That petrol is in your tank and just the tank, and the job is a drain and a flush where the vehicle sits. This is the one situation that can only truly occur at a forecourt, because anywhere else the vehicle has been driven to get there.
Started for a second, or only your ignition on. Once primed, the system has pulled petrol from that tank as far as the filter and your lines. Normally little more than clearing, flushing and seeing to the fuel filter, and so still straightforward.
Driven a couple of miles. Now your pump has spent these miles labouring on thinned fuel. The work is your tank, the fuel lines, your filter and clean fuel through the entire circuit, and how hard your car was driven counts as much as how far. A school run to Woodcroft Primary is one matter. A run as far as Portsmouth, under 10 miles away, is a very different task. So is any miles on the A3(M), under 3 miles from Wecock, where your engine has been labouring hard the whole time.
Clattering, a lumpy idle, smoke, a throttle gone soft: driven until it complained. The engine is telling you your fuel is no longer acting like diesel. Stop wherever you are — the verge on Kingfisher Close, a lay-by, a side street — and leave it where it is. A vehicle pulled over soon very seldom has lasting damage, since the fuel drain and the flush-through, which still go first, take care of it.
Stories Wecock motorists hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Topping up takes out nothing; it gives you a bigger tank of the same mix. That advice presumes a diesel fuel system handles petrol by percentage. It doesn't.
Myth: a modern diesel copes with a bit of petrol. Rather, the opposite. Smaller parts and higher pressure are how a current diesel runs its fuel, and that makes the protection count more, not less.
This is the one that catches people. Myth: "If it starts and drives, there's no harm done." The motorist of a petrol engine fed diesel usually stops, since it will not run, and the harm stops there. Feed petrol to a diesel and it generally fires up, ticks over and pulls away like nothing happened — all while its pump is wearing. Fine and running are not the same at all.
Myth: a two-stroke additive lets you to drive home. It is an old fix, supposed for another fault. It does not put back what petrol has weakened, and that petrol is still in your tank after that.
"Drain it yourself and you're sorted" — a myth, since after it's been running some petrol sits in the filter and lines, ready to go straight back through your pump on the next start. It's also genuinely risky to drain petrol into a can at the kerbside.
How does petrol in a diesel occur?
Carelessness is seldom the cause, and no one means to do it. The petrol nozzle is the narrower of the two and slips into a diesel filler with almost no resistance; a diesel nozzle generally will not go into a petrol vehicle at all. The forecourt makes it easy, and the error runs one way.
When routine and the vehicle stop matching, it occurs. A new motor, a hire car or a courtesy car. A household with one petrol and one diesel on the driveway. The pumps in a different order on a familiar forecourt. Racing for a train outside Rowlands Castle and filling up en route. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it takes place. Add rain, a phone call or a back seat full of children, and your hand does what it has always done.
Wecock people: how to prevent petrol in a diesel next time
- Check the petrol pump, not the colour. In the UK unleaded handles are usually green and diesel black, but not on each forecourt. The label is what matters.
- Inspect the filler flap. Plenty of vehicles state the fuel inside the flap or on the cap. Look at it on your first fill in any vehicle you do not know.
- One of each in the house? Label the key to the diesel — a coloured fob, a sticker — since intending to remember isn't enough.
- It sounds daft 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.
- Tuck your phone away. This is an easy mistake to make whilst you're thinking about something else.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to reject a petrol nozzle, and add-on devices are available for cars without one. They are a backstop, not a reason to stop checking the petrol pump.
- Less petrol makes a thinner blend, so stop as soon as you realise — while remembering that your next stage is unchanged. It's still not to start the car.
Petrol already in a diesel in Wecock? Begin here
Short and simple, then, is the order of things. Starting it is out, and so is turning on the ignition. Still on the forecourt, at Esso or anywhere else? Ask the attendants to help you push the vehicle clear of the petrol pump. Call 0333 366 0103 next, with three answers — your fuel, the approximate amount, and if it's run.
Corrosion and deposits are the problem with AdBlue, whereas petrol means lost lubrication. So if it was AdBlue, say so — and read its own Wecock page.
Why one petrol in a diesel job in Wecock costs more than another
Four different tasks lie behind the four scenarios above — which is why there's no honest single quote. Which of them you're in is mostly what shifts the cost. Two things follow that: the petrol that got in as a share of what the tank takes, then the spot the vehicle is in and whether a van can get to it safely.
Three questions come first, before quoting, rather than after — what was put in, how much, has it run — and this is the reason. Their answers are what change a range into one firm number.
About Wecock, for a moment
Wecock is a suburban area in Hampshire, situated approximately 7.6 miles north of Portsmouth and 57.3 miles south-west of London. Wecock sits at an elevation of around 59 metres, in a gently sloping inland area near the South Downs. Wecock is characterised by its predominantly semi-detached housing stock, with nearby neighbourhoods including Cowplain and Eastland Gate. Wecock has a population of around 6373 residents.
Across Hampshire and in Wecock: fuel drain cover
The vans answering petrol in diesel jobs around Wecock, in the PO postcode area, equally work the places near it, Cowplain, Eastland Gate and Honeywood Mews among them. Our engineers drain where your vehicle is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
Wecock: still at the petrol pump?
The best spot there is, then — that's where you are. Keep it off. Ring.