Petrol in a Diesel Car in Bartley: How Worried Should You Be?
Less than you probably are, provided it has not been started. Petrol resting in a diesel tank does nothing to the motor until something pulls it through your fuel system — the ignition priming your pump, your starter, or the drive itself. So the honest answer to the first question everyone around Bartley asks, "have I wrecked it?", is usually no. Petrol in Diesel is who to phone, with the engine kept off, so it remains that way. What petrol actually does to a diesel, how to gauge how far it has travelled, and how to stop it from happening a second time: that is the remainder of this page.
Petrol in a diesel: what does it do to your engine?
Two tasks fall to diesel on its route round a motor. It lubricates first, and after that does it burn. Your high-pressure pump and your injectors are made to very fine tolerances, and your diesel passing through them is what stops those surfaces from grinding against each other.
Badly at the first, not at all at the second: that's petrol. It is runnier than diesel and removes the protection your fuel system depends on, so a pump running on a petrol mix is a pump wearing itself. And petrol is made to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That's where the knocking comes from.
The shape of the problem is clear when you put those together. Not contact but movement is what causes the damage. A tank with petrol in it is a fuel fault. The beginning of a mechanical one is a pump that has been running on that petrol — and whatever a worn pump sheds travels on with your fuel to your injectors downstream.
How bad is petrol in a diesel? Four situations our engineers see in Bartley
Filled up, and never started: no case is better. Only that tank has petrol in it, and so the task is emptying that tank and rinsing the fuel system where the vehicle sits. This situation can only really take place on a forecourt: anywhere else, your car got there by being driven.
A brief spell of running, or just the ignition on. With the fuel system primed, your lines and filter already contain petrol that came from your tank. Usually nothing more than draining, cleaning and seeing to your filter, and so still straightforward.
Those few miles driven were your pump running on fuel weakened by petrol the whole way. The work is the tank, the fuel lines, your filter and clean fuel through the whole circuit, and how hard the car was driven counts as much as how far. On the school run to Bartley Church of England Junior School, the distance is short. Driving as far as Southampton, under 10 miles away, makes a very different task — as does any mileage on the M27, under a mile from Bartley, with your engine labouring hard all the way.
Driven till it protested. Knocking, an uneven idle, smoke, a throttle that has gone soft. What you are hearing is the engine reporting fuel that no longer acts like diesel. Pull up on the spot — on the verge on Brockishill Road, at the kerb, down a side road — and do not move it. Long-term damage is very unusual if a vehicle is pulled over soon, and the drain and flush-through that still come first take care of it.
Petrol in a diesel stories Bartley people hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it'll be." Nothing is removed by topping up — you're left with a fuller tank, still the same mixture. A diesel fuel system doesn't tolerate petrol by percentage in the way that advice supposes.
Not so: a newer diesel copes with a bit of petrol. Rather, the opposite. Finer parts and higher pressure are how a modern diesel runs its fuel, and that makes the lubrication count more, not less.
This is the one that fools motorists. Myth: "If it starts and drives, there is no harm done." Any petrol motor fed diesel normally will not run, so the motorist stops and the damage stops with them. While your pump grinds, a diesel fed petrol normally starts, ticks over and drives away as if nothing has happened. Running is not the same as fine.
Not so: a two-stroke additive makes it safe to drive home. It was an old workaround, supposed for another fault. None of what petrol diluted is put back by it — and afterwards, that tank still holds that petrol.
If the engine has been run, part of the petrol is in the fuel filter and your lines, not your tank — and the next start pulls it right back through your pump. So the myth "drain that tank yourself and you are sorted" does not stand up. Draining petrol into a can at the roadside is also truly risky.
Why petrol in a diesel occurs at all
It's seldom carelessness, and nobody does it on purpose. The petrol nozzle is the slimmer of the two and slips into a diesel filler with almost no resistance; a diesel nozzle mostly will not go into a petrol vehicle at all. The forecourt makes it easy, and the slip runs one way.
Habit and the car falling out of step is when it happens. Hire cars, courtesy cars, and vehicles that are new to you. Two cars on one driveway, one petrol, one diesel. A forecourt you know, only with its pumps arranged differently. A hurried fill en route to Ashurst New Forest with a train to catch. The first fill-up in a diesel Volkswagen Tiguan after years of driving petrol is exactly the moment it occurs. With rain, a call coming in, or children to deal with, the hand simply does what it has always done.
Bartley drivers: how to prevent petrol in a diesel next time
- The label is what matters, and so check the petrol pump rather than the colour: in the UK unleaded handles are normally green and diesel black, but not on each forecourt.
- In a motor you don't know, look inside the flap over the filler or at the cap before your first fill: many vehicles state the fuel type there.
- A coloured fob or a sticker on the diesel's key does more than any amount of intending to remember, in a home with one of each.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you lift the nozzle off the petrol pump. It seems daft and it works.
- Thinking about something else is when this becomes an easy mistake to make, so put your phone away and keep your mind on the pump.
- Some diesels have a filler designed to reject a petrol nozzle, and devices you can add are available for cars without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop reading the pump.
- Noticing it mid-fill? Stop there and then. A weaker mix results from less petrol in that tank, yet your next step stays the same: don't start the car.
Already put petrol in a diesel around Bartley?
Then the order of things is short. Never fire it up, and don't switch the ignition on. If you're still at the forecourt — Texaco or anywhere else — ask the attendants to help you push it clear of the petrol pump. Then ring 0333 366 0103 and tell us what went in, roughly how much, and if it has run.
Say so if it was AdBlue rather than petrol: it's a different fault, with its own page for Bartley, since AdBlue brings corrosion and deposits rather than lost lubrication.
Bartley petrol in a diesel jobs: why one costs more than another
Four different tasks lie behind the four situations above — which is why there is no fair single quote. The scenario itself does most of the work of moving your cost. Two things follow that: the petrol that went in as a proportion of what that tank holds, then the place the car is in and whether a technician can reach it safely.
Three questions come first, before any quote, rather than after — what got in, how much, has it run — and this is the reason. With the answers, you get a straight figure instead of a range.
About Bartley, briefly
Bartley is a small village in Hampshire, situated inland at an elevation of 26 metres, approximately 7 miles north of Southampton. Bartley has a population of around 892 residents and is characterised by predominantly detached housing. Bartley is located near the villages of Cadnam, Winsor, and Woodlands, and is about 74 miles southwest of London. Bartley sits in a rural area, surrounded by countryside.
Across Hampshire and in Bartley: fuel drain cover
Petrol in diesel calls in Bartley — part of the SO postcode area — go to vans that likewise cover the locations about it, Cadnam, Winsor and Woodlands among them. The vehicle doesn't need to come to us: our engineers drain on a forecourt, in a supermarket car park, in a lay-by or on your own driveway.
Bartley: still at the petrol pump?
Then you're in the best position there can be. Ring, and leave it turned off.