Netherton: Petrol in a Diesel Car? How Worried to Be
Not started? Then less worried than you probably are. "Have I wrecked it?" is the first thing everyone in Netherton asks, and the truthful answer is normally no, because petrol resting in a diesel tank harms nothing until it is drawn through your fuel system — by ignition priming, by your starter, or by being driven. To leave the vehicle that way, call Petrol in Diesel then leave your motor alone. Read on for three things: the effect petrol has inside a diesel engine, the clues of how far it has got, and ways to make sure you never do it again.
What petrol in a diesel does to the motor
On its way through a motor, diesel has two jobs. It lubricates to begin with, and only then does it burn. The high-pressure fuel pump and your injectors are built to extremely fine tolerances, and your diesel passing through them is what stops those surfaces from wearing down against one another.
Petrol handles the first task badly and the second not at all. It is runnier than diesel and strips away the lubrication your fuel system depends 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.
Seen together, they show what shape the issue has. Contact doesn't do the damage — movement does. Petrol in the tank is a fuel issue. Once the pump has been working on that petrol, a mechanical issue has started: anything shed by a pump that is wearing is carried onward to the injectors with the fuel.
Four situations our technicians see around Netherton: how serious is petrol in a diesel?
Filled up, never started. The best case there can be. On a forecourt, and truly only there, that petrol is still limited to your tank — because everywhere else the vehicle was driven to reach it. The task is draining and flushing on the spot.
A moment's running, or merely your ignition on. Petrol has come out of that tank and got to the filter and the fuel lines, because the system has been bled. Drain, flush, see to your filter: still usually straightforward.
Your pump now spent a few miles on diluted fuel — that's what driving the car meant. Tank, lines, filter, then clean fuel run through the whole circuit: that's the work, and the way the car was driven counts as much as the mileage. Driving the kids to South Crosland Church of England Voluntary Aided Junior School is one sort of trip. A run as far as Bradford, under 15 miles away, is a very different task. So is any distance on the Outlane Interchange, under 5 miles from Netherton, where the motor has been working hard throughout.
Driven until it protested. Knocking, an uneven idle, smoke, a throttle that has gone soft. The fuel isn't acting like diesel any more, and your engine is telling you. Stop where you are — on the verge on Beaumont Street, at the kerb, down a side road — and don't move it. A car pulled over soon very seldom has long-term damage, since the fuel drain and the flush, which still go first, sort it out.
What Netherton people get told about petrol in a diesel — and the myths in it
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. A diesel fuel system doesn't accept petrol by percentage in the way that guidance presumes.
Myth: a current diesel copes with a bit of petrol. Rather, the reverse. Finer components and higher pressure are how a modern diesel runs its fuel, and that makes the protection count more, not less.
Myth: "If it starts and drives, there is no harm done." This is the one that fools drivers. A petrol engine fed diesel normally won't run, and so the motorist stops and the harm stops with them. Feed petrol to a diesel and it usually starts, idles and pulls away as if nothing happened — all while its pump is wearing. Running is not the same as fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a different problem. None of what petrol weakened is put back by it — and later, that tank still holds the petrol.
If the motor has run, part of that petrol is in the fuel filter and the lines, not that tank — and your next start sends it right back through your pump. So the myth "drain your tank yourself and you're sorted" doesn't stand up. Also, a can of petrol filled by the kerbside is truly dangerous.
How does petrol in a diesel take place?
A careless moment is seldom the cause, and nobody 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 won't go into a petrol motor at all. The forecourt makes it simple, and the error runs one way.
When routine and your car stop matching, it takes place. Any car that's 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. A forecourt you know, but with its pumps laid out differently. A train to catch, and a rushed fill en route to Berry Brow. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it takes place. Throw in a back seat full of children, a phone call or rain, and habit wins.
Avoiding petrol in a diesel next time you fill up around Netherton
- Green for unleaded and black for diesel is usual in the UK — but not on every forecourt. Go by the label on the petrol pump, not the colour.
- Plenty of motors state the fuel type inside your filler flap or on the cap, and so check it on your first fill in any motor you don't know.
- A coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember, in a home with one of each.
- Before the nozzle comes off the petrol pump the first time you fuel a hired or new car, say "diesel" aloud. Daft, yes, but it does the trick.
- While you are thinking about something else, this is an easy mistake to make — so put the phone away.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler built to block a petrol nozzle, and add-on devices are available for the rest. Count it as a safety net, and keep reading the pump.
- Less petrol means a thinner mix, so stop the moment you notice — while remembering that your next step is unchanged. It is still not to start the vehicle.
Petrol already in a diesel around Netherton? Begin here
The order of things is short, then. Do not fire it up, and don't turn your ignition on. If you are still on the forecourt — Texaco or anywhere else — ask the attendants to help you roll it away from the pump. Next, 0333 366 0103. We'll ask what went in, roughly how much, and if it's been run.
Say so if it was AdBlue instead of petrol: it is a separate problem, with its own page for Netherton, because AdBlue brings corrosion and deposits rather than lost lubrication.
Netherton petrol in a diesel tasks: why one costs more than another
There is no fair single price for this, because the four scenarios above are four separate tasks. Which of them you are in is chiefly what shifts your cost. Two things follow that: the petrol that got in as a proportion of what that tank holds, then the place the vehicle is in and whether a technician can reach it safely.
Ahead of any quote, not after, we ask three questions: the fuel that got in, the volume, and if it has run. That's why. A range turns into a straight figure once the replies are in.
About Netherton and where it is
Netherton is a village in West Yorkshire, situated on the riverside at an elevation of 178 metres, with terraced housing being the predominant type of accommodation. Netherton lies approximately 12 miles from Bradford and 162 miles from London, making it a relatively small community in the region. Netherton is surrounded by nearby places such as Armitage Bridge, South Crosland, and Hanging Stone, which are all part of the local landscape. Netherton has a population of around 2415 people, according to recent estimates.
Netherton and West Yorkshire: where our fuel drain cover runs
Netherton waits in the HD postcode area, and the vans that answer petrol in diesel jobs there work the places near it as well — Armitage Bridge, South Crosland and Hanging Stone among them. The car doesn't need to move to us: our technicians drain at a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
Still at the petrol pump around Netherton?
Then, you could not be in a better spot. Keep the car switched off, and ring.