Should You Worry? Petrol in a Diesel Car in Yaddlethorpe
Likely less than you are now — provided nobody has started it. Everyone in Yaddlethorpe begins with "have I wrecked it?", and the honest answer is normally no: petrol left in that tank of a diesel remains harmless till priming, cranking or driving draws it into the system. To keep the car like that, call Petrol in Diesel then leave your motor alone. Keep reading for three things: the effect petrol has inside a diesel motor, the signs of how far it has got, and the way to make sure you don't repeat it.
Your engine and petrol in a diesel: what goes on
On its way through an engine, diesel does two jobs. It protects to begin with, and after that does it burn. Extremely fine clearances are built into your injectors and the high-pressure pump, and only the diesel running through keeps their surfaces from grinding together.
The second task petrol does not do at all, and the first it does badly. Being less viscous than diesel, petrol strips out the lubrication a fuel system needs, so a pump on that mixture wearing itself. It's equally made to resist igniting under compression — the opposite of what a diesel needs — which is where you hear the clattering.
The shape of the problem is clear when you put those together. Not contact but movement is what causes the harm. Where the petrol is only in the tank, it's a problem of fuel, nothing more. A pump that has been running on that petrol is the start of a mechanical one, and whatever a worn pump sheds moves on with your fuel to your injectors further on.
How bad is petrol in a diesel? Four scenarios our technicians see in Yaddlethorpe
The best case there can be: filled up, never started. At a forecourt, and really only there, the petrol is still limited to that tank — since everywhere else the vehicle was driven to reach it. The job is emptying and purging on the spot.
Ignition on, or started for a moment. Petrol has left your tank and got to your filter and the fuel lines, since your system has been primed. Still normally straightforward: drain, flush, and the filter sorted.
Those few miles on the road meant the pump labouring on fuel thinned by petrol throughout. How hard the vehicle was driven counts as much as how far, and the work covers your tank, your lines, the fuel filter and clean fuel through the entire system. Driving the kids to Leys Farm Junior School is one sort of trip. Very different again: a run to Kingston upon Hull, under 25 miles away, or any distance on the M180, under a mile from Yaddlethorpe, where your engine kept labouring hard.
Clattering, a ragged idle, smoke, a throttle gone soft: driven till it complained. What you are hearing is your motor reporting fuel that no longer acts like diesel. Whether it is the verge on Moorwell Road, a lay-by or a side road, stop where you are and leave it. What goes first is still the fuel drain and flush-through, and that takes care of it, with permanent damage very unusual if a car is pulled over early.
Stories Yaddlethorpe motorists hear about petrol in a diesel
"Top it up the rest of the way with diesel and it will be fine" — a myth. It will not. Nothing is removed by topping up — you are left with a bigger tank, still the same mixture. That guidance supposes a diesel fuel system handles petrol by percentage. It does not.
"Newer diesels can handle a little petrol" — a myth, and closer to the reverse. Smaller components and higher pressure are the way a current diesel runs its fuel, and that makes the protection count more, not less.
"It starts, it drives, so there is no harm" — the myth that trips up more drivers than any other. The driver of a petrol motor fed diesel usually stops, because it will not run, and the harm stops there. A diesel fed petrol usually starts, ticks over and drives away as though nothing has happened, whilst the pump wears. A running engine does not mean fine.
"A drop of two-stroke oil and drive it home" — a myth, taken from a fix from years ago, for a separate issue. The petrol is still inside the tank after that, and whatever it has thinned is not put back.
The next start draws petrol back round your pump from the fuel lines and the fuel filter, where some of that ends up after your engine has been run. That's why draining your tank yourself doesn't leave you sorted — a myth. And, a can of petrol filled at the kerbside is genuinely dangerous.
How petrol ends up: petrol in a diesel
Carelessness is seldom the cause, and nobody means to do it. The petrol nozzle is the slimmer of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly will not go into a petrol motor at all. The forecourt makes it simple, and the slip runs one way.
Habit and your car falling out of step is when it occurs. A new motor, a hire car or a courtesy car. Two cars on one drive, one petrol, one diesel. Your ordinary forecourt, its pumps now in a different order. A rushed fill en route to Scunthorpe with a train to catch. The first fill-up in a diesel Volkswagen Passat after years of driving petrol is precisely the moment it happens. Add a back seat full of children, a phone call or rain, and habit wins.
How to prevent petrol in a diesel at your next fill-up in Yaddlethorpe
- Not every forecourt in the UK follows green for unleaded and black for diesel, though most usually do. Check the pump's label; the colour is only a clue.
- In a car you do not know, look inside the flap over the filler or at the cap before the first fill: plenty of motors print the fuel type there.
- A coloured fob or a sticker on your diesel's key achieves more than any amount of intending to remember, for a house with one of each.
- Say it before you lift it. On the first fill in a new or hired car, say "diesel" out loud before you take the nozzle off the pump. It sounds daft and it works.
- While you are thinking about something else, this is an easy mistake to make — so put the phone away.
- Add-on devices are available for motors without one, and some diesels come with a filler that will not take a petrol nozzle. Useful — but a safety net only, never a reason to stop checking the label.
- Less petrol means a weaker mixture, so stop as soon as you notice — while remembering that your next stage is unchanged. It is still not to fire it up.
Yaddlethorpe: already put petrol in a diesel?
Then the order of things is short. Leave it unstarted, with the ignition off too. Ask the staff to help you push it clear of the pump if you're still on the forecourt, whether that is JET or somewhere else. Next, 0333 366 0103. We will ask what was put in, about how much, and if it has been run.
If it was AdBlue instead of petrol, say so. That's a separate issue — corrosion and deposits rather than lost lubrication — and it has its own page for Yaddlethorpe.
Why one petrol in a diesel task around Yaddlethorpe costs more than another
The four situations above are four separate jobs, so no single quote for this would be fair. Which of them you're in is chiefly what shifts the cost. The ratio matters next, meaning how much of your tank is petrol, followed by the location of the car and whether getting to it is safe for our van.
Ahead of any quote, not after, we ask three queries: the fuel that was put in, its volume, and whether it's run. That's why. A range turns into a straight figure once those answers are in.
About Yaddlethorpe
Yaddlethorpe is a suburban area in northern Lincolnshire, situated near the towns of Bottesford and Ashby. Yaddlethorpe lies at a low elevation of around 16 metres, in an area of gently rolling countryside near the Humber Estuary. Yaddlethorpe has a mix of housing types, but semi-detached homes are particularly prevalent in the area. Yaddlethorpe is located near several other communities, including Riddings and the larger city of Kingston upon Hull to the east.
Across Lincolnshire and around Yaddlethorpe: fuel drain cover
Riddings, Bottesford and Ashby are among the locations around Yaddlethorpe that the same teams work, answering petrol in diesel calls across Yaddlethorpe's DN postcode area. A forecourt, a supermarket car park, a lay-by or your own driveway are all spots our engineers work, and the vehicle does not need to move to us.
In Yaddlethorpe and still at the petrol pump?
No position is better: that's where you are. Phone, and keep it switched off.