Should You Worry? Petrol in a Diesel Car in Park Town
Less than you probably are, provided it has not been started. Petrol resting in a diesel tank does nothing to your motor till something pulls it through the fuel system — your ignition priming the pump, your starter, or the drive itself. So the fair answer to the first query anyone in Park Town asks, "have I wrecked it?", is generally no. Leave your motor off then call Petrol in Diesel — that keeps it like that. 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.
Petrol in a diesel: what does it do to your engine?
Diesel does two jobs on its way through a motor. It protects first, and after that does it burn. Extremely fine tolerances go into the fuel injectors and your high-pressure pump, and just your diesel flowing through stops their surfaces grinding together.
The second task petrol doesn't do at all, and the first it does badly. The rattling 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 the system rests on, and any pump working on such a mix is wearing itself.
Together, those make the shape of the problem plain. Not contact but circulation is what does the harm. A tank with petrol in it 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 moves on with your fuel to the fuel injectors further on.
Four situations we see in Park Town: how bad is petrol in a diesel?
Fuelled but never started — the best it gets. Just your tank has petrol in it, so the task is emptying your tank and rinsing the fuel system where the vehicle stands. This situation can only really happen at a forecourt: anywhere else, the car got there by being driven.
A brief spell of running, or merely your ignition on. Once primed, the fuel system has drawn petrol out of the tank as far as the filter and your lines. That is normally still an easy job — a drain, a flush, and the fuel filter dealt with.
The pump has worked a couple of miles on diluted fuel — that is what driving it does. Tank, lines, filter, then fresh fuel run through the entire circuit: that is the work, and the way the car was driven matters as much as the distance. The school run to St Aloysius' Catholic Primary School is one matter. Any miles on the M40, under 10 miles from Park Town, means the motor working hard throughout, and a run to Oxford, under 3 miles away, is a very different job too.
Driven on until it protested — rattling, smoke, an uneven idle, a soft throttle. That's the motor telling you its fuel has stopped behaving like diesel. Whether it is the verge on Park Town, a lay-by or a side road, stop where you are then leave it. The fuel drain and flush-through still go first, and they deal with it: if a vehicle is stopped early, lasting damage is very unusual.
Petrol in a diesel myths Park Town drivers hear
Myth: topping up to full with diesel makes it fine. It doesn't. Topping up takes out nothing; it gives you a bigger tank of the same mix. Percentage is not how a diesel fuel system copes with petrol, whatever that advice assumes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the reverse. At higher pressure, through more precise components: that's how a current diesel handles its fuel, so the lubrication matters more, not less.
"It starts, it drives, and so no harm done" — the myth that catches more motorists than any other. Feed diesel to a petrol engine and it generally will not run, so the driver stops — and the harm stops with them. A diesel fed petrol normally starts, idles and drives away as if nothing has happened, whilst your pump wears. Running is not the same as fine.
An old fix for a distinct fault lies behind this one. Myth: "Add some two-stroke oil and drive the car home." None of what petrol weakened is put back by it — and afterwards, that tank still contains that petrol.
Once your engine has run, part of that petrol sits in your filter and the lines, not that tank — and the next start pulls it right back through the pump. So the myth "drain that tank yourself and you're sorted" doesn't stand up. Emptying petrol into a can by the roadside is also truly dangerous.
How petrol ends up: petrol in a diesel
Nobody does it on purpose, and it's rarely carelessness. A diesel nozzle mostly will not go into a petrol motor, but the smaller petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one error straightforward, and only in one direction.
Habit and your car falling out of step is how it occurs. Courtesy car, hire car, or a vehicle that is brand new. One petrol and one diesel on the driveway of the same household. A familiar forecourt with the pumps in a different order. A train to catch, and a hurried fill en route to Oxford. A new-to-you diesel Volkswagen Passat, its first fuelling, and a driver used to petrol: precisely when it occurs. With rain, a call arriving, or a car full of children to deal with, your hand simply does what it always has.
Next time you fill up in Park Town: avoiding petrol in a diesel
- Check the petrol pump, not the colour. In the UK unleaded handles are generally green and diesel black, yet not on each forecourt. The label is what counts.
- The first fill in an unfamiliar vehicle is the time to check the filler flap — inside it, or on the cap, many cars state which fuel to use.
- A coloured fob or a sticker on the diesel's key achieves more than any amount of meaning to remember, for a household with one of each.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump. It sounds daft and it works.
- Tuck your phone away. This is an easy mistake to make while you're thinking about something else.
- Some diesels come with a filler built to refuse a petrol nozzle, and devices you can add are available for motors without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the petrol pump.
- Spotting it mid-fill? Stop at once. A thinner blend follows from less petrol inside your tank, yet the next step remains the same: don't start the car.
Park Town: already put petrol in a diesel?
Short and simple, then, is the order of things. Don't switch the ignition on, and do not fire it up. If you're still at the forecourt — BP or anywhere else — ask the attendants to help you roll the vehicle clear of the pump. What was put in, about how much, and whether it's run: tell us that when you call 0333 366 0103.
If it was AdBlue instead of petrol, say so. That's a different issue — corrosion and deposits and not lost lubrication — and it has its own page for Park Town.
Why one petrol in a diesel job in Park Town costs more than another
There's no fair single quote for this, because the four scenarios above are four separate tasks. Mostly, the cost moves with which situation you are in. Next it is the share — how much petrol went in against how much that tank holds — and after that where the car is and whether a van can get to it safely.
What was put in, how much, and if it has run — three questions our technicians ask before quoting, not after, for precisely that reason. Those replies are what change a range into one firm number.
About Park Town
Park Town is a suburban area located on the riverside in Oxfordshire, sitting at an elevation of 67 metres and close to the city of Oxford. Park Town is characterized by its predominant flat housing and is situated near other notable areas such as Norham Manor, Walton Manor, and Summertown. Park Town is also relatively close to London, being approximately 51.7 miles away, and has a population of around 4710 residents.
Across Oxfordshire and around Park Town: fuel drain cover
Norham Manor, Walton Manor and Summertown are among the locations near Park Town that the same vans work, answering petrol in diesel jobs across Park Town's OX postcode area. A forecourt, a supermarket car park, a lay-by or your own driveway are all places our engineers drain, and the vehicle does not need to move to us.
In Park Town and still at the petrol pump?
The best place there is, then — that is where you are. Ring, and leave it turned off.