Ben Rhydding: Petrol in a Diesel Car? How Worried to Be
If it hasn't been started, you can worry less than you probably are. "Have I wrecked it?" is the first question anyone around Ben Rhydding asks, and the honest answer is generally no, because petrol left in a diesel tank harms nothing till it's dragged through your fuel system — by ignition priming, by the starter, or by being driven. Keep it that way: leave the motor off then phone Petrol in Diesel. What petrol really does to a diesel, how to gauge how far it has gone, and how to keep it from happening again: that is the remainder of this page.
The motor and petrol in a diesel: what happens
Two jobs fall to diesel on its route through a motor. Lubricating comes before burning; it does both. The high-pressure fuel pump and the fuel injectors are built to very fine gaps, and your diesel passing through them is what stops those surfaces from wearing down against each other.
Badly at the first, not at all at the second: that is petrol. The clattering comes from petrol being made 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 away the lubrication your system depends on, and any pump working on that mix is wearing itself.
Put these together and the shape of the trouble is clear. Not contact but movement is what does the harm. Any tank with petrol in it is a fuel fault. Once the pump has been working on that petrol, a mechanical issue has begun: whatever is shed by a pump that is grinding is carried onward to the fuel injectors with the fuel.
Four scenarios our engineers see in Ben Rhydding: how bad is petrol in a diesel?
Fuelled but not once started — as good as it gets. The petrol is inside the tank and only that tank, and the job is a drain and a flush where the vehicle sits. This is the one situation that can only really happen at a forecourt, as anywhere else the vehicle has been driven to get there.
Started for a second, or just your ignition on. With your system primed, the lines and filter now hold petrol that has come from your tank. That's generally still an easy task — a drain, a flush, and the filter seen to.
Some miles driven, and your pump has spent every one of them running on diluted fuel. The work is that tank, the fuel lines, your filter and clean fuel through the entire system, and how hard the car was driven matters as much as how far. A school run to Ben Rhydding Primary School is one matter. Very different again: a run to Bradford, under 10 miles away, or any miles on the M606, under 15 miles from Ben Rhydding, where the motor kept working hard.
It protested, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone lumpy. The motor is telling you your fuel is no longer acting like diesel. Stop wherever you are — the verge on Old Lane, a lay-by, a side street — then leave the car where it is. The fuel drain and flush-through still come first, and they take care of it: if a car is stopped early, lasting damage is very uncommon.
Ben Rhydding motorists and the petrol in a diesel stories they hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." A fuller tank of the same mixture is all it gives, since topping up removes nothing. A diesel fuel system does not tolerate petrol by percentage in the way that advice presumes.
Myth: a modern diesel copes with a bit of petrol. Rather, the opposite. A current diesel runs its fuel through smaller parts at higher pressure, which makes the lubrication count more, not less.
One myth that catches people off guard: if it starts and drives, it must be unharmed. Any petrol motor fed diesel usually will not run, so the driver stops and the damage stops with them. Feed petrol to a diesel and it normally starts, ticks over and pulls away as if nothing happened — all the while its pump is wearing. Being able to run isn't the same as being fine.
An outdated fix for a distinct problem is behind this one. Myth: "Add some two-stroke oil and drive it home." None of what petrol diluted gets put back by it — and afterwards, that tank still contains the petrol.
If the engine has been run, part of the petrol sits in the fuel filter and the fuel lines, not your tank — and your next start sends it right back through your pump. So the myth "drain the tank yourself and you are sorted" does not hold. It is also truly risky to drain petrol into a can by the kerbside.
Petrol in a diesel: how does it occur?
It is seldom carelessness, and no one does it on purpose. The petrol nozzle is the smaller of the two and slides 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 simple, and the mistake runs one way.
The moment routine stops matching the car is the moment it occurs. A new motor, a hire car or a courtesy car. Households running one of each, petrol and diesel. Your ordinary forecourt, its pumps suddenly in a different order. Fuelling up in a rush en route to the nearest station, with a train to catch. Years of petrol motors behind you, a diesel Skoda Octavia in front of you at the forecourt for its first tank — that is when. Throw in a back seat full of children, a phone call or rain, and the hand takes over.
How to avoid petrol in a diesel at your next fill-up around Ben Rhydding
- The label is what matters, and so read the pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on every forecourt.
- Many motors state the fuel inside your filler flap or on the cap, so check there on the first fill in a car you don't know.
- Label your key. In a house with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of intending to remember.
- "Diesel", out loud, before you lift the nozzle — every time a new or hired car gets its first tank. It sounds daft. It does the trick.
- Mistakes like this are straightforward to make whilst your mind is on something else, so your phone goes away.
- A misfuel inhibitor helps, up to a point. Some diesels come with a filler designed to block a petrol nozzle, and add-on devices exist for vehicles without one. They are a backstop, not a reason to stop checking the pump.
- Stop as soon as you realise. Less petrol inside your tank makes a weaker mixture. It doesn't change what to do next, which is still not to crank it.
Ben Rhydding: already put petrol in a diesel?
Short and simple, then, is the order of things. Never crank it, and do not turn your ignition on. The attendants at the forecourt — whether at Texaco itself or wherever you filled up — will usually help push it clear of the petrol pump if you ask. Call 0333 366 0103 next, with three answers — your fuel, the rough volume, and if it's run.
Say so if it was AdBlue rather than petrol: it is a different fault, with its own page for Ben Rhydding, because AdBlue brings corrosion and deposits rather than lost protection.
Why one petrol in a diesel task in Ben Rhydding costs more than another
There is no honest single quote for this, because the four situations above are four separate jobs. Which of them you are in is chiefly what shifts the cost. Where your car is matters too, and whether our van can safely get to it, after the proportion of petrol to what the tank takes.
What went in, how much, and whether it's run — three queries we ask before quoting, not after, for precisely that reason. The replies turn a range into a straight figure.
About Ben Rhydding itself
Ben Rhydding is a suburban area in West Yorkshire, situated on the banks of the River Wharfe at an elevation of 151 metres. Ben Rhydding lies approximately 9 miles from Bradford and is close to the town of Ilkley, with the surrounding countryside offering scenic views. Ben Rhydding is characterised by its predominantly detached housing stock, reflecting its development as a residential area. Ben Rhydding has a population of around 2747 people, according to recent estimates.
Ben Rhydding and West Yorkshire: where our fuel drain cover reaches
Ilkley, Stead and Middleton are among the places near Ben Rhydding that the same vans work, answering petrol in diesel jobs across Ben Rhydding's LS postcode area. No need to bring the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations we drain.
In Ben Rhydding and still at the petrol pump?
No position is better: that's where you are. Keep the vehicle switched off, and ring.