Should You Worry? Petrol in a Diesel Car in Kelloe
Less than you probably are, if it has not been started. Till the ignition primes the pump, the starter cranks, or your car is driven, petrol in a diesel tank just waits there and does no harm. Which makes the honest reply to that first Kelloe question — "have I ruined it?" — usually no. Leave the engine off and ring Petrol in Diesel — that is how you keep it like that. Further down, you will find what petrol really does inside a diesel, how far it may have got, and how to stop it happening to you again.
Petrol in a diesel: what does it do to the motor?
Diesel does two jobs on its way through a motor. It lubricates to begin with, and only then does it burn. What stops the surfaces inside your high-pressure pump and the injectors from grinding against one another is the diesel flowing through them — they're designed to extremely fine gaps.
Of these two jobs, petrol handles the first badly and the second never. A pump running on a petrol blend is wearing itself out, because petrol is thinner than diesel and takes away the lubrication your fuel system depends on. Petrol is also made to resist igniting under compression — the reverse of what a diesel needs from its fuel — and that is where the clattering starts.
Put those together and the shape of the trouble is clear. It's movement that causes the harm, not contact. Where that petrol is only in that tank, it's a problem of fuel, nothing more. Whatever a worn pump sheds goes on, borne by your fuel, into your injectors further along, which is why a pump that has worked on the petrol is where a mechanical fault begins.
Petrol in a diesel in Kelloe: how serious is it? Four situations
Filled but never started — the best it gets. Just your tank has petrol in it, so the job is emptying the tank and flushing your system where the vehicle stands. This situation can only really occur on a forecourt: anywhere else, your car got there by being driven.
The ignition turned on, or a brief start. The fuel system has been primed, so petrol has left that tank and got to the filter and the fuel lines. Usually nothing more than clearing, purging and sorting the fuel filter, so still straightforward.
Those few miles on the road were the pump running on fuel diluted by petrol the whole way. The work is your tank, the lines, the filter and clean fuel through the whole system, and how hard your car was driven counts as much as how far. Driving the kids to Kelloe Primary School is one sort of trip. Any distance on the A1(M), under 3 miles from Kelloe, means the engine working hard throughout, and a run to Durham, under 10 miles away, is a very different task as well.
It complained, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone lumpy. That is your motor telling you its fuel no longer is behaving like diesel. Leave it wherever it has stopped: a lay-by, a side street, the verge on Woodland Crescent. A vehicle pulled over soon very rarely has long-term damage, as the drain and the flush, which still go first, sort it out.
What Kelloe motorists get told about petrol in a diesel — and the stories in it
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Nothing is removed when you top up — the tank simply holds more of the same blend. A diesel fuel system doesn't accept petrol by percentage in the way that guidance assumes.
Myth: 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 handles its fuel, so the lubrication counts for more, not less.
One myth that catches drivers off guard: if it starts and drives, it must be unharmed. Diesel in a petrol motor usually means a motor that won't run: the driver stops, and so does the damage. Feed petrol to a diesel and it normally fires up, idles and drives away as if nothing has happened — all while its pump wears. Being able to run isn't the same as being fine.
Myth: "Add some two-stroke oil and drive the car home." It's an outdated fix for a different fault. None of what petrol thinned is put back by it — and afterwards, that tank still holds the petrol.
The next start sends petrol back round the pump from your lines and the filter, where some of it ends up after the engine has run. That's why a DIY tank drain does not leave you sorted — a myth. It's also genuinely dangerous to drain petrol into a can at the roadside.
Why petrol in a diesel occurs at all
A careless moment is rarely the cause, and nobody means to do it. One way only, since of the nozzles: the smaller petrol one slips inside a diesel filler with almost no resistance, whereas the diesel one generally will not fit a petrol motor. That's how the forecourt makes it straightforward.
When routine and your car stop matching, it takes place. Hire cars, courtesy cars, and cars that are new to you. Households running one of each, petrol and diesel. A forecourt you know, but with its pumps laid out differently. Racing for a train outside Durham and filling up en route. A new-to-you diesel Volkswagen Golf, its first fuelling, and a motorist accustomed to petrol: precisely when it happens. The hand repeats what it has always done when you add rain, a phone call or a back seat full of children.
Next time you fill up around Kelloe: avoiding petrol in a diesel
- Read the pump, not the colour. In the UK unleaded handles are normally green and diesel black, yet not on every forecourt. The label is what matters.
- Many vehicles state the fuel type inside the filler flap or on the cap, so check it on your first fill in a vehicle you don't know.
- A coloured fob or a sticker on the diesel's key does more than any amount of intending to remember, for a household with one of each.
- It sounds daft and it works: on your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump.
- Thinking about something else is when this becomes an easy mistake to make, and so tuck your phone away then keep your mind on the pump.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler designed to block a petrol nozzle, and add-on devices exist for motors without one. They are a safety net, not a reason to stop checking the pump.
- Less petrol means a weaker mix, and so stop as soon as you realise — while remembering that the next stage is unchanged. It's still not to fire it up.
Put petrol in a diesel in Kelloe already?
In that case, there's just a short order of things. Do not crank it, and don't switch the ignition on. If you're still at the forecourt — Shell or anywhere else — ask the staff to help you push it away from the petrol pump. Then phone 0333 366 0103 and tell us what got in, about how much, and if it's run.
If it was AdBlue and not petrol, say so. That is a different issue — corrosion and deposits and not lost protection — and it has its own page for Kelloe.
One petrol in a diesel job in Kelloe costs more than another. Why?
The four situations above are four different jobs, so no single price for this would be honest. The situation itself does most of the work of moving the cost. The share counts next, meaning how much of the tank is petrol, followed by the position of the vehicle and whether getting to it is safe for a van.
What went in, how much, and if it has run — three questions our technicians ask before pricing, not after, for exactly that reason. Their answers are what turn a range into one firm number.
About Kelloe
Kelloe is a village situated on the riverside in County Durham, with a population of around 1108 people. Kelloe sits at an elevation of 134 metres, approximately 5.9 miles from the city of Durham. Kelloe has a mix of housing types, but semi-detached homes are the most predominant. Kelloe is located near other small settlements, including Davy Lamp, Church Kelloe, and Quarrington Hill.
Fuel drain cover across Durham, Kelloe included
Petrol in diesel call-outs around Kelloe — part of the DH postcode area — go to vans that also cover the places about it, Davy Lamp, Church Kelloe and Quarrington Hill among them. No need to bring the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations where we work.
At the pump in Kelloe, still?
Then, you couldn't be in a better place. Turned off it stays; then call.