Petrol in a Diesel Car in Tangier: How Worried Should You Be?
Far less than you probably are, if it hasn't been started. Everyone in Tangier begins with "have I wrecked it?", and the fair answer is usually no: petrol resting in that tank of a diesel remains harmless until priming, cranking or driving pulls it into the system. Leave your engine off then call Petrol in Diesel — that keeps it like that. Further down, this page sets out what petrol really does inside a diesel, how far it may have got, and how to stop it happening to you a second time.
Your engine and petrol in a diesel: what goes on
Passing through a motor, diesel does two things at once. Before it combusts, it lubricates — and then it combusts. The high-pressure fuel pump and the fuel injectors are designed to extremely fine tolerances, and the diesel passing through them is what stops those surfaces from wearing down against each other.
Petrol does the first task badly and the second not at all. It is runnier than diesel and strips away the lubrication the fuel system rests 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 opposite of what a diesel needs from its fuel. That's where the knocking comes from.
Put these together and the shape of the issue is plain. Contact doesn't do the damage — movement does. Petrol in the tank is a fuel fault. Whatever a worn pump sheds goes on, borne by the fuel, into the injectors downstream, which is why a pump that has been working on the petrol is where a mechanical fault begins.
Petrol in a diesel in Tangier: how bad is it? Four cases
The best case there is: filled up, not once started. That petrol is in your tank and only that tank, and the task is a drain and a flush where your car sits. This is the one scenario that can only really occur at a forecourt, as anywhere else the car has been driven to get there.
A brief spell of running, or merely your ignition on. With the system primed, the fuel lines and filter already hold petrol that has come from that tank. Drain, flush, see to the filter: still usually straightforward.
Driven a couple of miles. Now your pump has spent those miles working on weakened fuel. Distance is only half of that; how hard it was driven counts equally. Either way the work runs to your tank, the lines, the fuel filter and fresh fuel through the whole circuit. Short trips, like the school run to North Town Academy, are one thing. Very different once more: a run to Wells, under 25 miles away, or some distance on the M5, under 3 miles from Tangier, where the motor kept working hard.
It complained, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone ragged. That's the engine telling you its fuel no longer is acting like diesel. Stop wherever you are — the verge on A3807, a lay-by, a side street — and leave it where it is. What goes first is still the drain and flush, and that takes care of it, with permanent damage very unusual if a car is pulled over quickly.
Petrol in a diesel stories Tangier motorists hear
"Top it up the rest of the way with diesel and it will be fine" — a myth. It will not. A bigger tank of the same mix is all it gives, since topping up takes out nothing. A diesel fuel system doesn't tolerate petrol by percentage in the way that advice presumes.
"Current diesels can handle a little petrol" — a myth, and closer to the opposite. At higher pressure, through smaller parts: that's how a modern diesel handles its fuel, so the lubrication counts more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that catches people. Any petrol engine fed diesel normally won't run, so the motorist stops and the harm stops with them. A diesel fed petrol generally starts, idles and drives away as though nothing has happened, while your pump grinds. A running engine doesn't mean fine.
An old fix for a different issue is behind this one. Myth: "Add some two-stroke oil and drive the car home." None of what petrol thinned is put back by it — and later, your tank still contains that petrol.
The next start draws petrol back round your pump out of your lines and the fuel filter, where some of that ends up after the engine has run. That's why draining the tank yourself does not leave you sorted — a myth. And, a can of petrol filled at the kerbside is genuinely hazardous.
Petrol in a diesel: how does it occur?
Carelessness is rarely the cause, and nobody means to do it. One way only, since of the nozzles: the slimmer petrol one slips inside a diesel filler with almost no resistance, while the diesel one generally won't fit a petrol vehicle. That's how the forecourt makes it straightforward.
Habit and the vehicle falling out of step is how it occurs. Any car that's new to you — hired, on loan as a courtesy car, or just bought. Households running one of each, petrol and diesel. A forecourt you know, but with its pumps arranged differently. Fuelling up in a rush on the way to Taunton, with a train to catch. Years of petrol motors behind you, a diesel Volkswagen Golf in front of you at the forecourt for its first tank — that is when. With rain, a call coming in, or a car full of children to deal with, your hand simply does what it has always done.
Tangier motorists: how to avoid petrol in a diesel next time
- A green handle for unleaded and black for diesel is usual in the UK — but not on each forecourt. Go by the label on the pump, not the colour.
- Plenty of vehicles state the fuel type inside your filler flap or on the cap, so check it on the first fill in a car you do not know.
- A coloured fob or a sticker on the diesel's key achieves more than any amount of intending to remember, for a house with one of each.
- It seems silly and it works: on the first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the petrol pump.
- Thinking about something else is when this becomes an easy mistake to make, so tuck the phone away then keep your mind on the pump.
- Some diesels have a filler designed to refuse a petrol nozzle, and devices you can add exist for vehicles without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop reading the petrol pump.
- Noticing it halfway? Stop there and then. A weaker mixture results from less petrol in the tank, but your next stage stays the same: do not start the car.
Petrol already in a diesel around Tangier? Start here
Then the order of things is brief. Don't turn the ignition on, and do not start it. The staff at the forecourt — whether at Morrisons itself or wherever you filled up — will usually help roll it clear of the pump if you ask. Call 0333 366 0103 next, with three facts — your fuel, the rough volume, and whether it's run.
Corrosion and deposits form the problem with AdBlue, whereas petrol means lost lubrication. So if it was AdBlue, say so — and see its own Tangier page.
One petrol in a diesel task in Tangier costs more than another. Why?
An honest single price doesn't exist here: four situations, four separate jobs. Which of them you're in is mostly what shifts the cost. Two things come after that: the petrol that was put in as a share of what the tank holds, then the spot the vehicle is in and whether a technician can reach it safely.
Ahead of any quote, not after, we ask three queries: your fuel that went in, its volume, and if it's run. That is why. A range becomes a straight figure when the replies are in.
About Tangier
Tangier is a suburban area in Somerset, situated on the riverside at a low elevation of around 17 metres. Tangier is located near the cities of Wells and Taunton, and is also close to the smaller areas of North Town and Wilton. Tangier has a population of approximately 4193 people, and is characterised by a predominance of flat housing. Tangier is some distance from London, at around 133 miles to the west.
Fuel drain cover in Tangier and across Somerset
The vans answering petrol in diesel calls around Tangier, in the TA postcode area, equally work the spots around it, Taunton, North Town and Wilton included. A forecourt, a supermarket car park, a lay-by or your own driveway are all places our technicians drain, and the car doesn't need to come to us.
In Tangier and still at the petrol pump?
Then you're in the best position there can be. Keep the car turned off, then ring.