Petrol in a Diesel Car in Gasthorpe: How Worried Should You Be?
Not started? Then less anxious than you likely are. Until your ignition primes your pump, the starter turns, or the car is driven, petrol in a diesel tank just rests there and does no harm. Which means the truthful reply to the first Gasthorpe query — "have I ruined it?" — normally no. Petrol in Diesel is who to ring, with your motor kept off, and so it remains that way. Keep reading for three things: the effect petrol has inside a diesel engine, the clues of how far it has spread, and the way to make sure you never repeat it.
Inside the motor: what petrol in a diesel does
Passing through a motor, diesel does two jobs at the same time. It protects to begin with, and after that does it burn. What keeps the surfaces inside the high-pressure fuel pump and the injectors from wearing against one another is your diesel flowing through them — they're built to very fine gaps.
Badly at the first, not at all at the second: that is petrol. A pump working on a petrol blend is wearing itself out, since petrol is runnier than diesel and strips out the lubrication the fuel system relies on. Petrol is also made to resist igniting under compression — the opposite of what a diesel needs from its fuel — and that is where any clattering starts.
The shape of the issue is plain once you put those together. Contact does not do the harm — circulation does. All a tank with petrol in it amounts to is a fuel problem. Whatever a worn pump sheds travels on, borne by your fuel, into the fuel injectors further along, which is why a pump that has been working on the petrol is where a mechanical issue starts.
Four situations our engineers see around Gasthorpe: how bad is petrol in a diesel?
Fuelled up, never started. The best case there can be. Just that tank has petrol in it, so the job is draining that tank and rinsing your system where the vehicle stands. This situation can only truly occur on a forecourt: anywhere else, the car got there by being driven.
Your ignition switched on, or a brief start. With the system primed, your lines and filter now contain petrol that came from your tank. Still generally simple: drain, flush, and the fuel filter dealt with.
Driven a couple of miles. Now the pump has spent those miles running on thinned fuel. The work is the tank, the lines, your filter and fresh fuel through the entire system, and how hard your car was driven counts as much as how far. Driving the kids to Hopton Church of England Primary Academy is one kind of trip. Driving as far as Norwich, under 25 miles away, makes a very different job — as does any miles on the M11, under 50 miles from Gasthorpe, with the engine labouring hard all the way.
Driven till it protested. Rattling, an uneven idle, smoke, a throttle that has gone soft. That is your engine telling you its fuel has stopped acting like diesel. Pull up where you are — on the verge on The Street, at the kerb, down a side road — and don't move it again. Lasting damage is very uncommon when a vehicle is pulled over early, and the fuel drain and flush-through that still come first deal with it.
Petrol in a diesel myths Gasthorpe drivers hear
Myth: topping up to full with diesel makes it fine. It doesn't. Nothing is removed by topping up — you are left with a bigger tank, still the same mix. That guidance assumes a diesel fuel system handles petrol by percentage. It doesn't.
If anything, the opposite is true. Myth: "A modern diesel can cope with a bit of petrol." A modern diesel runs its fuel through more precise components at higher pressure, which makes the lubrication matter more, not less.
This is the one that fools people. Myth: "If it starts and drives, there is no damage done." The driver of a petrol motor fed diesel usually has no choice but to stop, since it will not run, and the damage stops there. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually will; meanwhile your pump grinds. Running is not the same as fine.
An old workaround for a distinct problem lies behind this one. Myth: "Add some two-stroke oil and drive the vehicle home." None of what petrol diluted gets put back by it — and later, that tank still holds that petrol.
The next start sends petrol back round your pump out of your lines and the fuel filter, where some of that sits after the engine has run. That is why a DIY tank drain doesn't sort it — a myth. Emptying petrol into a can at the roadside is also truly dangerous.
How it happens: petrol in a diesel
On purpose? Never. Through carelessness? Seldom, if ever. One way only, because of the nozzles: the slimmer petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one generally will not fit a petrol vehicle. That's how the forecourt makes it easy.
The moment routine stops matching your car is the moment it happens. A new motor, a hire car or a courtesy car. Households running one of each, petrol and diesel. Your usual forecourt, its pumps now in a different order. Fuelling up in a hurry on the way to Harling Road, with a train to catch. Years of petrol vehicles behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that is when. Add rain, a phone call or a back seat full of children, and the hand does what it has always done.
Gasthorpe motorists: how to prevent petrol in a diesel next time
- Check the pump, not the colour. In the UK unleaded handles are usually green and diesel black, yet not on every forecourt. The label is what counts.
- In a motor you do not know, look inside the flap over your filler or at the cap before your first fill: plenty of cars state the fuel there.
- A coloured fob or a sticker on your diesel's key does more than any amount of intending to remember, in a home with one of each.
- "Diesel", out loud, before you lift the nozzle — every time a new or hired car needs its first tank. It seems daft. It works.
- While you're thinking about something else, this is an easy mistake to make — so put your phone away.
- A misfuel inhibitor helps, up to a point. Some diesels have a filler built to block a petrol nozzle, and add-on devices are available for vehicles without one. They are a backstop, not a reason to stop reading the pump.
- Less petrol means a thinner blend, so stop as soon as you notice — though remembering that the next stage is unchanged. It's still not to start the car.
Already put petrol in a diesel around Gasthorpe?
Then the order of things is short. Never fire it up, and do not switch your ignition on. Still on the forecourt, at Shell or anywhere else? Ask the staff to help you push the vehicle clear of the petrol pump. Then phone 0333 366 0103 and tell us what went in, about how much, and if it has run.
If it was AdBlue instead of petrol, say so. That's a separate fault — corrosion and deposits rather than lost lubrication — and it has its own page for Gasthorpe.
Gasthorpe petrol in a diesel jobs: why one costs more than another
There's no honest single quote for this, since the four scenarios above are four separate jobs. The situation itself does most of the work of moving your cost. Where your car is matters too, and whether a technician can safely get to it, after the proportion of petrol to what your tank takes.
What was put in, how much, and whether it's run — three queries our engineers ask before costing, not after, for exactly that reason. Their replies are what turn a range into one firm number.
About Gasthorpe
Gasthorpe is a small hamlet situated on the shores of lakes in the Norfolk countryside, with an elevation of around 21 metres. Gasthorpe lies near several other rural communities, including Knettishall, Hopton, and Garboldisham, and is approximately 23 miles from the city of Norwich. Gasthorpe is characterized by its predominantly detached housing stock, reflecting its quiet, rural nature. Gasthorpe is also relatively distant from major urban centres, being around 75 miles from London.
Across Norfolk and around Gasthorpe: fuel drain cover
Petrol in diesel call-outs around Gasthorpe — part of the IP postcode area — go to teams that likewise cover the places round it, Knettishall, Hopton and Garboldisham among them. Our technicians drain where the vehicle is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
Gasthorpe: still at the pump?
Then, you couldn't be in a better place. Call, and leave it switched off.