Should You Worry? Petrol in a Diesel Car in Acomb
Provided it has not been started, worry far less than you likely are. Till your ignition primes the pump, your starter turns, or the vehicle is driven, petrol in a diesel tank simply sits there and does nothing. Which makes the truthful reply to the first Acomb query — "have I ruined it?" — usually no. Keep it like that: leave the motor off then call Petrol in Diesel. What petrol really does to a diesel, how to judge how far it's gone, and how to stop it from happening again: that is the remainder of this page.
What petrol in a diesel does to your engine
Two jobs fall to diesel on its journey through a motor. Oiling comes before burning; it does both. Very fine tolerances are built into your injectors and your high-pressure pump, and just the diesel running through keeps those surfaces from grinding together.
Petrol does the first task poorly and the second not at all. The rattling comes from petrol being made not to ignite when compressed, which is exactly 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 running on that mix is wearing itself.
Together, those leave the shape of the trouble clear. The harm is done by circulation, not by contact. Where the petrol is only inside the tank, it is a problem of fuel, nothing more. A pump that has been labouring on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with the fuel to the injectors downstream.
How bad is petrol in a diesel? Four situations our technicians see in Acomb
The best case there is: filled up, not once started. The petrol is in the tank and only that tank, and the job is a drain and a flush where the car stands. This is the one situation that can only truly occur at a forecourt, as anywhere else the car has been driven to get there.
Ignition on, or started for a second. Your system has been primed, so petrol has left the tank and got to the filter and your lines. That's generally still a simple job — a drain, a flush, and your filter dealt with.
Your pump has worked a few miles on diluted fuel — that is what driving it does. Mileage is only half of that; how hard it was driven counts equally. Either way the work runs to that tank, the lines, your filter and fresh fuel through the entire system. Short trips, such as the school run to Acomb First School, are one matter. Getting as far as Newcastle upon Tyne, under 25 miles away, makes a very different task — as does any mileage on the Central Motorway East, under 25 miles from Acomb, with your engine running hard all the way.
Driven on till it protested — knocking, smoke, a ragged idle, a soft throttle. The motor is telling you your fuel is no longer behaving like diesel. Stop on the spot — on the verge on Main Street, at the kerb, down a side road — and do not move it again. Long-term damage is very unusual if a car is stopped quickly, and the fuel drain and flush that still go first sort it out.
Acomb people and the petrol in a diesel myths they hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. A bigger tank of the same mix is all you get, because topping up takes out nothing. Percentage is not how a diesel fuel system tolerates petrol, whatever that advice supposes.
Not so: a newer diesel copes with a bit of petrol. If anything, the reverse. At higher pressure, through smaller components: that is how a newer diesel moves its fuel, and so the protection matters for more, not less.
This is the one that catches drivers. Myth: "If it starts and drives, there is no damage done." The driver of a petrol engine fed diesel usually stops, since it will not run, and the damage stops with them. Whilst the pump wears, a diesel fed petrol normally starts, idles and drives away as if nothing has happened. Running is not the same as fine.
Not so: a two-stroke additive lets you to drive home. It was an old workaround, supposed for another problem. The petrol is still inside that tank after that, and whatever it has diluted isn't put back.
"Drain it yourself and you're sorted" — a myth, because after it's been running some petrol sits in your filter and lines, waiting to go right back through your pump at your next start. Also, a can of petrol drained at the kerbside is genuinely hazardous.
Why petrol in a diesel takes place so easily
No one does it on purpose, and it is rarely carelessness. One way only, since of the nozzles: the smaller petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one mostly will not fit a petrol car. That is how the forecourt makes it simple.
The moment routine stops matching your car is the moment it happens. Hire cars, courtesy cars, and vehicles that are new to you. Households running one of each, petrol and diesel. A forecourt you know, but with its pumps arranged differently. Rushing for a train at Hexham and fuelling up en route. Years of petrol cars behind you, a diesel Renault Megane in front of you at the forecourt for its first tank — that's when. Your hand repeats what it has always done when you add rain, a phone call or a back seat full of kids.
Acomb motorists: how to avoid petrol in a diesel next time
- Read the petrol pump, not the colour. In the UK unleaded handles are usually green and diesel black, yet not on every forecourt. The label is what matters.
- Many motors state the fuel inside your filler flap or on the cap, and so check there on the first fill in a vehicle you don't know.
- Good intentions do less than a sticker or a fob in a vivid colour on the diesel's key if a household has one of each. So label it.
- It seems daft and it works: on your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump.
- Thinking about something else is when this becomes an easy mistake to make, so put your phone away and keep your mind on the petrol pump.
- Add-on devices exist for cars without one, and some diesels are built with a filler that will not accept a petrol nozzle. Helpful — but a safety net at best, never a reason to stop checking the label.
- As soon as you notice, stop: less petrol inside that tank makes a thinner mixture. What to do next does not change, though — still do not start it.
Petrol already in a diesel around Acomb? Start here
Then, there is only a short order of things. Starting it is out, and so is switching on your ignition. The staff at the forecourt — whether at BP itself or wherever you filled up — will usually help push it clear of the pump if you ask. Then phone 0333 366 0103 and tell us what got in, about how much, and if it's run.
Corrosion and deposits form the problem with AdBlue, whereas petrol brings lost lubrication. So if it was AdBlue, say so — and read its own Acomb page.
Acomb petrol in a diesel tasks: why one costs more than another
There is no honest single quote for this, because the four situations above are four different jobs. Which of them you are in is mostly what moves the cost. The share matters next, meaning how much of the tank is petrol, followed by the location of the vehicle and whether getting to it is safe for our van.
What was put in, how much, and if it has run — three questions our technicians ask before pricing, not after, for precisely that reason. Those replies turn a range into a straight figure.
About Acomb itself
Acomb is a village in Northumberland, situated on the riverside at an elevation of 79 metres, with semi-detached housing being the predominant type of accommodation. Acomb lies near the villages of The Riding, Warden, and Nether Warden, and is approximately 19.8 miles from Newcastle upon Tyne. Acomb has a population of around 1297 people, and its location in the north east of England makes it around 254.3 miles from London. Acomb's riverside setting provides a distinctive character to the village.
Fuel drain cover across Northumberland, Acomb included
Acomb sits in the NE postcode area, and our vans that answer petrol in diesel call-outs there work the spots near it as well — The Riding, Warden and Nether Warden among them. Our technicians drain where the vehicle is — your own drive, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
At the petrol pump in Acomb, right now?
The best place there is, then — that is where you are. Phone, and keep it turned off.