How Worried Should You Be? Petrol in a Diesel Car in Moors Bank
If it hasn't been started, you can worry less than you probably are. Until the ignition primes the pump, the starter cranks, or your car is driven, petrol in a diesel tank simply waits there and does nothing. Which makes the truthful reply to that first Moors Bank query — "have I ruined it?" — usually no. Keep it like that: leave your motor off and ring Petrol in Diesel. 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 don't repeat it.
What petrol in a diesel does to your engine
On its way through an engine, diesel has two jobs. It lubricates first, and only then does it burn. Extremely fine gaps are built into the fuel injectors and the high-pressure pump, and only your diesel flowing through stops those surfaces grinding together.
Of those two tasks, petrol handles the first poorly and the second not at all. The knocking 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 thinner than diesel, it strips away the protection the system hinges on, and any pump working on such a mix is wearing itself.
Taken together, they make clear what shape the trouble has. The damage is done by circulation, not by contact. Any tank with petrol in it is a fuel fault. The beginning of a mechanical one is a pump that has been running on that petrol — and whatever a worn pump sheds travels on with the fuel to the fuel injectors beyond it.
How bad is petrol in a diesel? Four scenarios our engineers see in Moors Bank
The best case there can be: filled up, not once started. Only the tank has petrol in it, and so the task is clearing the tank and flushing the system where your car stands. This situation can only really happen on a forecourt: anywhere else, the vehicle got there by being driven.
Started for a moment, or just the ignition on. Your system has been bled, and so petrol has left the tank and got to your filter and the lines. That is usually still an easy task — a drain, a flush, and your filter dealt with.
Driven a few miles. Now your pump has spent those miles running on thinned fuel. The work is that tank, the fuel lines, the filter and clean fuel through the entire circuit, and how hard the vehicle was driven matters as much as how far. A school run to Gobowen Primary School is one thing. A run as far as Wrexham, under 10 miles away, is a very different task. So is any miles on the M53, under 25 miles from Moors Bank, where your engine has been labouring hard throughout.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone uneven. That is your engine telling you its fuel has stopped acting like diesel. Pull up wherever you are — the verge on Overton Road, a lay-by, a side street — and leave the vehicle there. A vehicle stopped quickly very rarely has long-term damage, because the drain and the flush, which still go first, deal with it.
Petrol in a diesel myths Moors Bank drivers hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Nothing is removed by topping up — you're left with a fuller tank, still the same mixture. A diesel fuel system does not tolerate petrol by percentage in the way that advice supposes.
"Current diesels can handle a little petrol" — a myth, and closer to the reverse. A modern diesel runs its fuel through finer components at higher pressure, which makes the lubrication count more, not less.
One myth that catches drivers off guard: if it starts and drives, it must be unharmed. The motorist of a petrol motor fed diesel usually stops, because it will not run, and the damage stops with them. A diesel fed petrol generally starts, idles and drives away as if nothing has happened, whilst your pump wears. Fine and running aren't the same thing.
Myth: a two-stroke additive makes it safe to drive home. It is an old workaround, supposed for another issue. The petrol is still in your tank after that, and whatever it has weakened is not put back.
"Drain it yourself and you are sorted" — a myth, because after it's been running some petrol sits in the filter and lines, ready to go right back through your pump at the next start. On top of that, petrol emptied into a can by the road is genuinely risky.
Petrol in a diesel: how does it take place?
Nobody does it on purpose, and it's rarely carelessness. A diesel nozzle mostly will not fit a petrol car, yet the narrower petrol nozzle goes into the filler of a diesel almost without resistance — so forecourts make this one mistake straightforward, and just in one direction.
It occurs when routine and your car stop matching. A vehicle that is new to you — a hire car, on loan as a courtesy car, or brand new. One petrol and one diesel on the drive of the same household. Your usual forecourt, its pumps suddenly in a different order. A train to catch, and a rushed fill en route to Gobowen. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it occurs. Your hand does what it has always done once you add rain, a phone call or a back seat full of kids.
Moors Bank drivers: how to prevent petrol in a diesel next time
- Read the petrol pump, not the colour. In the UK unleaded handles are usually green and diesel black, but not on every forecourt. The label is what matters.
- Plenty of vehicles state the fuel type inside your filler flap or on the cap, and so check there on your first fill in a motor you don't know.
- One of each in the home? Label the key to your diesel — a bright fob, a sticker — since meaning to remember isn't enough.
- "Diesel", out loud, before you pick up the nozzle — each time a new or hired car needs its first tank. It seems silly. It works.
- Tuck the phone away. This is an easy mistake to make whilst you are thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler built to reject a petrol nozzle, and add-on devices exist for the rest. Treat it as a backstop, then keep reading the pump.
- The moment you realise, stop: less petrol in that tank means a thinner mix. What to do next does not change, though — still do not start the vehicle.
Already put petrol in a diesel in Moors Bank?
Short and simple, then, is the order of things. Leave it unstarted, with your ignition off as well. The staff at the forecourt — whether at Texaco itself or wherever you filled up — will normally help roll it clear of the pump if you ask. Then phone 0333 366 0103 and tell us what got in, roughly how much, and whether it has run.
If it was AdBlue rather than petrol, say so. That's a different issue — corrosion and deposits rather than lost protection — and it has its own page for Moors Bank.
One petrol in a diesel job in Moors Bank costs more than another. Why?
Four separate jobs sit behind the four scenarios above — which is why there is no honest single quote. What shifts your cost is mostly which of them you are in. The ratio counts next, meaning how much of your tank is petrol, and then the location of the vehicle and whether getting to it is safe for our van.
Three queries come first, before quoting, instead of after — what got in, how much, has it run — and that is the reason. Those answers change a range into a straight figure.
About Moors Bank, for a moment
Moors Bank is a suburban area situated on the riverside in Shropshire, with a mix of semi-detached housing and a population of around 855 residents. Moors Bank sits at an elevation of 114 metres, close to nearby places such as St Martins Moor and New Ifton. Moors Bank is located near the Welsh border, approximately 9 miles from Wrexham and 156 miles from London. Moors Bank remains a relatively small residential community with a quiet atmosphere.
Across Shropshire and in Moors Bank: fuel drain cover
The vans answering petrol in diesel calls around Moors Bank, in the SY postcode area, equally work the locations around it, St Martins Moor, New Ifton and Nefod among them. A forecourt, a supermarket car park, a lay-by or your own drive are all spots our engineers drain, and the vehicle doesn't need to move to us.
Moors Bank: still at the pump?
No position is better: that is where you now are. Turned off it stays; then call.