Oscott: Petrol in a Diesel Car? How Worried to Be
If it has not been started, worry less than you probably are. Petrol resting in a diesel tank does nothing to your engine till something draws it through the fuel system — the ignition priming your pump, your starter, or the drive on its own. So the truthful answer to the first query anyone around Oscott asks, "have I wrecked it?", is usually no. Leave your motor off and call Petrol in Diesel — that keeps it like that. Below, you will find what petrol really does inside a diesel, how far it might have gone, and how to stop it happening to you again.
Inside the motor: what petrol in a diesel does
Passing through an engine, diesel does two jobs at once. Lubricating comes before burning; it does both. Extremely fine tolerances are built into your injectors and the high-pressure pump, and only the diesel running through keeps their surfaces from grinding together.
Poorly at the first, not at all at the second: that is petrol. The knocking comes from petrol being designed not to ignite when compressed, which is precisely the opposite of what a diesel needs. On top of that it is runnier than diesel, it strips out the protection your system rests on, and any pump running on such a mix is wearing itself.
Taken together, they show the shape the problem has. The damage is done by movement, not by contact. Any tank with petrol in it is a fuel issue. After the pump has been labouring on that petrol, a mechanical fault has started: anything shed by a pump that's grinding travels onward to the fuel injectors with the fuel.
Petrol in a diesel around Oscott: how bad is it? Four situations
The best case there is: filled up, not once started. Just that tank has petrol in it, and so the task is emptying that tank and purging the fuel system where the vehicle sits. This situation can only really occur on a forecourt: anywhere else, your car got there by being driven.
Ignition on, or started for a second. Once primed, your system has pulled petrol from your tank up to the fuel filter and your lines. Drain, flush, deal with your filter: still usually easy.
The pump has spent a couple of miles on thinned fuel — that is what driving the vehicle does. The work is that tank, your lines, the fuel filter and clean fuel through the entire circuit, and how hard your car was driven counts as much as how far. Short trips, such as the school run to Story Wood School, are one thing. A run as far as Birmingham, under 5 miles away, is a very different task. So is any mileage on the M6, under 3 miles from Oscott, where your engine has been working hard throughout.
It protested, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone ragged. The fuel is not acting like diesel any more, and the motor is telling you. Leave it where it has stopped: a lay-by, a side street, the verge on Thornby Road. Permanent damage is very rare when a car is pulled over early, and the drain and flush-through that still come first sort it out.
Oscott motorists and the petrol in a diesel stories they hear
False: topping up to full with diesel makes it fine. It does not. Nothing comes out when you top up — the tank just holds more of the same mixture. Percentage isn't how a diesel fuel system copes with petrol, however much that guidance supposes.
Myth: "A current diesel can cope with a bit of petrol." If anything, the reverse. Finer components and higher pressure are how a modern diesel runs its fuel, and that makes the lubrication matter more, not less.
One myth that catches people out: if it starts and drives, it must be unharmed. The motorist of a petrol motor fed diesel normally has no choice but to stop, since it will not run, and the damage stops with them. Whilst the pump wears, a diesel fed petrol usually starts, idles and drives away as though nothing has happened. A running engine doesn't mean fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct problem. None of what petrol diluted is put back by it — and later, your tank still contains that petrol.
The next start draws petrol back round the pump out of your lines and your filter, where some of it sits after the engine has been run. That is why draining your tank yourself does not leave you sorted — a myth. Besides, petrol emptied into a can by the road is truly dangerous.
Why petrol in a diesel takes place at all
A careless moment is rarely the cause, and nobody means to do it. One way only, because of the nozzles: the smaller petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one generally won't fit a petrol motor. That's how the forecourt makes it easy.
The moment habit stops matching the vehicle is the moment it occurs. Hire cars, courtesy cars, and motors that are new to you. Households running one of each, petrol and diesel. The pumps in a different order on a well-known forecourt. Filling up in a rush on the way to Erdington, with a train to catch. A new-to-you diesel Renault Megane, its first fuelling, and a driver used to petrol: precisely when it takes place. Throw in rain, a phone call or a back seat full of children, and the hand does what it has always done.
Avoiding petrol in a diesel next time you fill up around Oscott
- The label is what counts, so read the pump instead of the colour: in the UK unleaded handles are usually green and diesel black, but not on each forecourt.
- Check the filler flap. Many motors state the fuel inside the flap or on the cap. Look at it on the first fill in a motor you do not know.
- One of each in the house? Label your key to the diesel — a bright fob, a sticker — since meaning to remember isn't enough.
- "Diesel", out loud, before you lift the nozzle — each time a new or hired car needs its first tank. It seems silly. It does the trick.
- Tuck your phone away. This is an easy mistake to make while you're thinking about something else.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler designed to reject a petrol nozzle, and add-on devices are available for vehicles without one. They are a safety net, not a reason to stop checking the petrol pump.
- Less petrol means a weaker blend, so stop the moment you notice — though remembering that your next stage is unchanged. It's still not to crank it.
Oscott: already put petrol in a diesel?
In that case, there's only a short order of things. Leave it unstarted, with your ignition off too. If you are still at the forecourt — BP or anywhere else — ask the staff to help you roll the vehicle clear of the pump. Ring 0333 366 0103 next, with three facts — the fuel, the approximate volume, and whether it's run.
Say so if it was AdBlue instead of petrol: it's a different problem, with its own page for Oscott, because AdBlue brings corrosion and deposits instead of lost lubrication.
Oscott petrol in a diesel jobs: why one costs more than another
There is no fair single quote for this, since the four situations above are four different tasks. Which of them you are in is mostly what shifts your cost. Where your car is counts too, and whether a technician can safely reach it, after the share of petrol to what your tank takes.
Ahead of any quote, not after, we ask three questions: the fuel that went in, its amount, and whether it's run. That's why. A range turns into a straight figure once those answers are in.
About Oscott
Oscott is a suburban area in the West Midlands, situated approximately 4.6 miles north of Birmingham city centre. Oscott occupies a relatively low-lying area at an elevation of around 118 metres, with nearby neighbourhoods including Perry Common and Short Heath. Oscott has a population of around 10,450 people, predominantly living in semi-detached housing. Oscott is also close to the nearby area of New Oscott, which is often associated with the suburb.
Across West Midlands and around Oscott: fuel drain cover
The vans answering petrol in diesel jobs around Oscott, in the B postcode area, equally work the spots around it, Perry Common, Short Heath and New Oscott among them. No need to move your vehicle to us. Forecourts, supermarket car parks, lay-bys and your own driveway are all spots we drain.
Still at the pump in Oscott?
Then you are in the best position there is. Phone, and leave it turned off.