Petrol in a Diesel Car in Kinning Park: How Worried Should You Be?
Less than you probably are, if it has not been started. Petrol sitting in a diesel tank does nothing to your engine until something draws it through your fuel system — your ignition priming the pump, the starter, or the drive itself. So the honest answer to the first query anyone around Kinning Park asks, "have I ruined it?", is generally no. To keep it that way, ring Petrol in Diesel then leave your engine switched off. The rest of this page covers what petrol really does to a diesel, how to judge how far it has got, and how to make sure it does not happen to you again.
The motor and petrol in a diesel: what happens
Two jobs fall to diesel on its route round a motor. It protects first, and only then does it burn. What stops the surfaces inside your high-pressure pump and your injectors from grinding against each other is your diesel passing through them — they are made to very fine gaps.
Badly at the first, not at all at the second: that is petrol. It's runnier than diesel and strips away the protection the fuel system rests on, and so a pump running on a petrol blend 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 is where the rattling comes from.
The shape of the issue is plain when you put those together. It's movement that does the damage, not contact. Where the petrol is only in your tank, it's 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 your fuel to your injectors further on.
Four situations we see in Kinning Park: how bad is petrol in a diesel?
Filled up, not once started. The best case there can be. Being on a forecourt is what makes this the case: elsewhere, your car has been driven there to begin with. With that petrol kept inside your tank alone, it is emptied and flushed on the spot, and nothing more is needed.
Started for a moment, or only the ignition on. Petrol has left that tank and reached the fuel filter and your lines, since the fuel system has been primed. Drain, flush, see to your filter: still normally easy.
A few miles driven, and your pump has spent each of them labouring on diluted fuel. Tank, lines, filter, then fresh fuel run through the entire circuit: that's this work, and the way the vehicle was driven counts as much as the distance. On the school run to the local primary school, the distance is short. Very different a second time: a run to Glasgow, under 3 miles away, or some mileage on the M8, under a mile from Kinning Park, where your engine never stopped working hard.
Driven on until it complained — knocking, smoke, a ragged idle, a soft throttle. The motor is telling you your fuel is no longer behaving like diesel. Leave it wherever it has stopped: a lay-by, a quiet street, the verge on Lorne Street. A vehicle stopped early very rarely has long-term damage, because the drain and the flush, which still go first, take care of it.
Stories Kinning Park people hear about petrol in a diesel
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Topping up removes nothing; it gives you a fuller tank of the same mixture. A diesel fuel system doesn't accept petrol by percentage in the way that guidance presumes.
Myth: a modern diesel copes with a bit of petrol. Rather, the reverse. More precise parts and higher pressure are how a current diesel runs its fuel, and that makes the protection matter more, not less.
This is the one that fools people. Myth: "If it starts and drives, there's no harm done." Diesel in a petrol motor generally leaves a motor that will not run: the driver stops, and so does the damage. A diesel fed petrol generally starts, idles and drives away as though nothing has happened, whilst your pump grinds. A running engine doesn't mean fine.
An old workaround for a different issue lies behind this one. Myth: "Add some two-stroke oil and drive it home." That petrol is still in the tank after that, and whatever it has diluted is not put back.
Myth: "Drain that tank yourself and you're sorted." After your engine has been run, some of that petrol is no longer in that tank: it is in the filter and your lines, and it goes right back through your pump at your next start. Draining petrol into a can at the roadside is also truly hazardous.
How does petrol in a diesel occur?
Nobody does it on purpose, and it's rarely carelessness. The petrol nozzle is the smaller of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally won't go into a petrol motor at all. The forecourt makes it easy, and the error runs one way.
When routine and the vehicle stop matching, it takes place. Any car 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. The pumps in a different order on a familiar forecourt. A train to catch, and a hurried fill en route to Exhibition Centre. Precisely the moment it happens: after years of driving petrol, someone fills a diesel BMW 3 Series for the first time. With rain, a call coming in, or children to deal with, the hand simply does what it always has.
Next time you fill up in Kinning Park: avoiding petrol in a diesel
- The label is what matters, and so read the petrol pump instead of the colour: in the UK unleaded handles are normally green and diesel black, yet not on every forecourt.
- Check the filler flap. Plenty of motors state the fuel type inside the flap or on the cap. Look at it on the first fill in a motor you don't know.
- Label your key. In a household with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of intending to remember.
- Before the nozzle leaves the petrol pump the first time you fill a hired or new vehicle, say "diesel" aloud. Daft, yes, yet it works.
- Put your phone away. This is an easy mistake to make while you are thinking about something else.
- Add-on devices are available for cars without one, and some diesels come with a filler that won't accept a petrol nozzle. Useful — but a safety net at best, never a reason to stop checking the label.
- As soon as you realise, stop: less petrol inside your tank makes a weaker mixture. What to do next does not change, though — still do not fire it up.
Already put petrol in a diesel in Kinning Park?
The order of things is brief, then. Starting it is out, and so is turning on your ignition. The attendants on the forecourt — whether at BP itself or wherever you filled up — will usually help push it clear of the pump if you ask. Phone 0333 366 0103 next, with three answers — your fuel, the rough amount, and if it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a separate fault — Kinning Park has a page just for it.
One petrol in a diesel task in Kinning Park costs more than another. Why?
There is no honest single price for this, because the four scenarios above are four different jobs. Mostly, your cost moves with which one you are in. The ratio counts next, meaning how much of the tank is petrol, and then the location of your car and whether getting to it is safe for our van.
That's why our engineers ask three queries before costing instead of after: what got in, how much, and whether it has run. The answers change a range into a straight figure.
About Kinning Park itself
Kinning Park is a suburban area in Glasgow City, situated on the north bank of the River Clyde at an elevation of around 11 metres. Kinning Park is characterized by its predominantly flat-type housing and is located close to the nearby places of Cessnock, Lancefield, and Riverside. Kinning Park is a relatively small area, with a population of approximately 6225 people, and is situated about 2.1 miles from Glasgow city centre.
Kinning Park and Glasgow City: where our fuel drain cover runs
Petrol in diesel calls around Kinning Park — part of the G postcode area — go to vans that also cover the locations around it, Cessnock, Lancefield and Riverside among them. Our engineers drain where your car is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
Kinning Park: still at the pump?
The best spot there is, then — that's where you are. Keep the vehicle switched off, and ring.