How Worried Should You Be? Petrol in a Diesel Car in Workington
If it hasn't been started, worry far less than you likely are. "Have I ruined it?" is the first thing everyone in Workington asks, and the truthful answer is usually no, because petrol resting in a diesel tank hurts nothing till it is drawn through the system — by ignition priming, by the starter, or by driving. To leave it like that, call Petrol in Diesel then leave your motor alone. Further down, you will find what petrol really does inside a diesel, how far it might have got, and how to stop it happening to you a second time.
What petrol in a diesel does to your engine
Passing through a motor, diesel is doing two jobs at the same time. It combusts, and before it ignites it protects. The high-pressure pump and your injectors are designed to very fine clearances, and your diesel passing through them is what keeps those surfaces from wearing down against one another.
Poorly at the first, not at all at the second: that's petrol. It's thinner than diesel and removes the lubrication the fuel system depends on, and so a pump running on a petrol mixture 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's where the clattering comes from.
Taken together, they make clear what shape the problem has. Not contact but movement is what does the damage. All a tank with petrol in it amounts to is a fuel problem. The beginning of a mechanical one is a pump that has been labouring on that petrol — and whatever a worn pump sheds moves on with your fuel to your injectors beyond it.
Workington, petrol in a diesel: four cases, from mild to significant
Fuelled but never started — as good as it gets. Being on a forecourt is what makes this possible: elsewhere, the vehicle has been driven there to begin with. With that petrol kept inside the tank alone, it's drained and purged on the spot, and nothing more is needed.
A moment's running, or merely the ignition on. The system has been primed, and so petrol has left your tank and reached the filter and your lines. Normally little more than draining, cleaning and sorting the filter, so still simple.
Those few miles on the road were your pump working on fuel weakened by petrol the whole way. How hard the car was driven counts as much as how far, and this work takes in the tank, the lines, the fuel filter and clean fuel through the whole circuit. Driving the kids to St Patrick's Catholic Primary School is one kind of trip. A run as far as Carlisle, under 50 miles away, is a very different job. So is any mileage on the Southwaite Services Northbound, under 50 miles from Workington, where your engine has been running hard the whole time.
Driven until it protested. Knocking, a ragged idle, smoke, a throttle that has gone soft. The fuel isn't behaving like diesel any more, and the engine is telling you. Stop on the spot — on the verge on Oxford Street, at the kerb, down a side road — and don't move it again. The drain and flush still come first, and they sort it out: if a vehicle is pulled over early, lasting damage is very unusual.
Myths Workington drivers hear about petrol in a diesel
False: topping up to full with diesel makes it fine. It doesn't. Nothing comes out when you top up — that tank just holds more of the same mixture. Percentage isn't how a diesel fuel system tolerates petrol, whatever that guidance assumes.
Not so: a newer diesel copes with a bit of petrol. If anything, the reverse. More precise components and higher pressure are how a newer diesel runs its fuel, and that makes the lubrication matter more, not less.
This is the one that fools motorists. Myth: "If it starts and drives, there's no damage done." Feed diesel to a petrol motor and it usually will not run, so the driver stops — and the damage stops with them. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually does; meanwhile your pump grinds. Running isn't the same as fine.
Myth: a two-stroke additive lets you to drive home. It was an old fix, meant for another issue. None of what petrol weakened is put back by it — and later, the tank still holds the petrol.
"Drain it yourself and you're sorted" — a myth, because after it has been running some petrol sits in the filter and lines, ready to go right back through your pump on your next start. On top of that, petrol cleared into a can by the road is truly dangerous.
Why petrol in a diesel takes place at all
It is rarely carelessness, and nobody 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 won't go into a petrol vehicle at all. The forecourt makes it easy, and the mistake runs one way.
When routine and your car stop matching, it occurs. A new motor, a hire car or a courtesy car. Households running one of each, petrol and diesel. A forecourt you know, but with its pumps arranged differently. Racing for a train outside the nearest station and filling up en route. Precisely the moment it takes place: after years of driving petrol, someone fills a diesel Renault Megane for the first time. Throw in rain, a phone call or a back seat full of children, and the hand does what it has always done.
Next time you fill up in Workington: preventing petrol in a diesel
- Not every forecourt in the UK follows green for unleaded and black for diesel, though most usually do. Read the petrol pump's label; the colour is only a hint.
- In a vehicle you don't know, look inside the flap over your filler or at the cap before the first fill: many cars state the fuel there.
- A coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember, in a home with one of each.
- Before the nozzle leaves the pump the first time you fuel a hired or new motor, say "diesel" out loud. Silly, perhaps, yet it works.
- Mistakes like this are easy to make while your mind is on something else, and so your phone goes away.
- Add-on devices exist for vehicles without one, and some diesels come with a filler that won't accept a petrol nozzle. Helpful — but a safety net at best, never a reason to stop checking the label.
- As soon as you realise, stop: less petrol inside the tank means a weaker mixture. What to do next doesn't change, though — still do not crank it.
Already put petrol in a diesel in Workington?
The order of things is short, then. Starting it is out, and so is turning on your ignition. Yet on the forecourt, at Morrisons or anywhere else? Ask the staff to help you push the car away from the pump. What got in, roughly how much, and whether it has run: tell us those when you call 0333 366 0103.
If it was AdBlue and not petrol, say so. That's a separate fault — corrosion and deposits instead of lost lubrication — and it has its own page for Workington.
One petrol in a diesel job in Workington costs more than another. Why?
The four scenarios above are four separate tasks, so no single price for this would be fair. Which of them you are in is mostly what shifts your cost. Where the car is matters too, and whether a technician can safely reach it, after the ratio of petrol to what your tank takes.
Before any quote, not after, come three queries: your fuel that got in, the quantity, and whether it's run. That is why. Their replies are what turn a range into one firm number.
About Workington
Workington is a coastal town in Cumbria, situated on the west coast of England, approximately 30 miles from Carlisle. Workington sits at a low elevation of around 17 metres, with its terraced housing reflecting its historical development as an industrial centre. Workington is close to nearby places such as North Side, Mossbay, and Westfield, and is home to a population of around 14741 people. Workington has a distinctive character shaped by its coastal location and industrial heritage.
Workington and Cumbria: where our fuel drain cover runs
Petrol in diesel jobs around Workington — part of the CA postcode area — go to teams that likewise cover the spots round it, North Side, Mossbay and Westfield among them. The car does not need to move to us: our engineers drain on a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
Workington: still at the petrol pump?
The best spot there is, then — that's where you are. Ring, and leave it switched off.