Should You Worry? Petrol in a Diesel Car in Albert Hill
Likely less than you already are — as long as no one has started the vehicle. Everyone in Albert Hill starts with "have I wrecked it?", and the honest answer is usually no: petrol resting in the tank of a diesel remains harmless until priming, cranking or driving draws it into the system. Leave your motor off then phone Petrol in Diesel — that keeps it like that. 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.
Inside the motor: what petrol in a diesel really does
Passing through an engine, diesel is doing two things at once. Oiling comes before burning; it does both. What stops the surfaces inside the high-pressure pump and the injectors from wearing against one another is the diesel passing through them — they are built to very fine gaps.
Of these two tasks, petrol handles the first poorly and the second not at all. It is runnier than diesel and removes the protection your fuel system depends on, and so a pump running on a petrol mixture is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the opposite of what a diesel needs from its fuel. That's where the clattering comes from.
The shape of the problem is plain once you put those together. It's movement that causes the damage, not contact. All a tank with petrol in it amounts to is a fuel problem. Once your pump has been labouring on that petrol, a mechanical issue has begun: whatever is shed by a pump that's grinding travels downstream to the injectors with the fuel.
How serious is petrol in a diesel? Four scenarios we see around Albert Hill
Filled but never started — as good as it gets. Being on a forecourt is what makes this possible: elsewhere, your car has been driven there to begin with. With that petrol kept in your tank alone, it's emptied and flushed right where it stands, and nothing more is needed.
A moment's running, or merely your ignition on. The fuel system has been bled, so petrol has left your tank and got to the filter and the fuel lines. That is normally still an easy job — a drain, a flush, and your filter dealt with.
Your pump has worked a couple of miles on weakened fuel — that is what driving the car meant. Mileage is only half of it; how hard it was driven counts equally. Either way the work runs to your tank, your lines, the fuel filter and fresh fuel through the entire circuit. Driving the kids to Gurney Pease Academy is one sort of trip. Driving as far as Durham, under 25 miles away, makes a very different job — as does any mileage on the A66(M), under 3 miles from Albert Hill, with your engine working hard the whole time.
Driven until it complained. Clattering, an uneven idle, smoke, a throttle that has gone soft. What you are hearing is the engine signalling fuel that no longer runs like diesel. Leave it where it stops: a lay-by, a side street, the verge on St James Court. A car pulled over quickly very rarely has long-term damage, since the drain and the flush-through, which still go first, take care of it.
Albert Hill motorists and the petrol in a diesel stories they 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 you get, since topping up removes nothing. A diesel fuel system does not tolerate petrol by percentage in the way that guidance supposes.
Myth: a newer diesel copes with a bit of petrol. Rather, the reverse. At higher pressure, through smaller components: that is how a current diesel handles its fuel, so the protection counts for more, not less.
This is the one that fools motorists. Myth: "If it starts and drives, there is no harm done." The driver of a petrol motor fed diesel normally stops, because it will not run, and the harm stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually does; meanwhile your pump wears. Fine and running aren't the same at all.
An outdated fix for a separate problem lies behind this one. Myth: "Add some two-stroke oil and drive the car home." It doesn't put back what petrol has diluted, and that petrol is still inside your tank after that.
Myth: "Drain the tank yourself and you're sorted." Once the engine has been run, some of the petrol is no longer in that tank: it is in your filter and your lines, and it goes right back through your pump at your next start. It is also really dangerous to drain petrol into a can at the roadside.
How does petrol in a diesel occur?
It's seldom carelessness, and nobody does it on purpose. 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 motor. That's how the forecourt makes it simple.
When routine and your car stop matching, it takes place. Hire cars, courtesy cars, and motors that are new to you. Households running one of each, petrol and diesel. Your normal forecourt, its pumps now in a different order. Racing for a train outside North Road and filling up en route. Years of petrol vehicles behind you, a diesel Volkswagen Tiguan in front of you at the forecourt for its first tank — that is when. Throw in rain, a phone call or a back seat full of kids, and your hand does what it has always done.
Albert Hill motorists: how to prevent petrol in a diesel next time
- A green handle for unleaded and black for diesel is normal in the UK — but not on each forecourt. Trust the label on the petrol pump, not the colour.
- The first fill in a new motor is the time to check the filler flap — on it, or on the cap, plenty of vehicles state which fuel they take.
- Mark 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 meaning to remember.
- Before the nozzle comes off the petrol pump the first time you fill a hired or new motor, say "diesel" out loud. Silly, yes, but it works.
- Mistakes like this are straightforward to make whilst your mind is on something else, so the phone goes away.
- Up to a point, a misfuel inhibitor helps: some diesels come with a filler built to reject a petrol nozzle, and aftermarket devices exist for the rest. Count it as a backstop, and keep reading the petrol pump.
- As soon as you realise, stop: less petrol in that tank means a weaker mix. What to do next doesn't change, though — still do not start it.
Already put petrol in a diesel around Albert Hill?
Then, there is just a short order of things. Don't switch the ignition on, and do not crank it. Ask the staff to help you push it clear of the pump if you're still on the forecourt, whether that's Shell or somewhere else. What went in, roughly how much, and whether it has run: tell us those when you phone 0333 366 0103.
Corrosion and deposits form the issue with AdBlue, whereas petrol brings lost protection. So if it was AdBlue, say so — and read its own Albert Hill page.
Albert Hill petrol in a diesel jobs: why one costs more than another
The four situations above are four different jobs, so no single quote for this would be fair. Mostly, the cost moves with which one you are in. Where the vehicle is counts too, and whether a technician can safely get to it, after the proportion of petrol to what that tank takes.
Ahead of any quote, not after, we ask three questions: your fuel that went in, the amount, and if it has run. That's why. Those answers are what turn a range into one firm number.
About Albert Hill and its setting
Albert Hill is a suburban area located on the riverside in County Durham, with an elevation of 53 metres above sea level. Albert Hill sits near the city of Durham, approximately 17 miles away, and is close to nearby places such as Hope Town and Bank Top. Albert Hill has a population of around 3381 residents, predominantly living in semi-detached housing. Albert Hill is situated in the North East region of England, about 217 miles north of London.
Albert Hill and Durham: where our fuel drain cover runs
Albert Hill sits in the DL postcode area, and the teams that answer petrol in diesel call-outs there work the spots around it as well — Hope Town, Eastbourne and Bank Top among them. The car does not need to move to us: we drain at a forecourt, in a supermarket car park, in a lay-by or on your own drive.
At the petrol pump around Albert Hill, still?
The best spot there is, then — that is where you are. Turned off it stays; then phone.