Should You Worry? Petrol in a Diesel Car in Galgate
Far less than you probably are, if it has not been started. "Have I wrecked it?" is the first thing anyone around Galgate asks, and the honest answer is generally no, because petrol resting in a diesel tank harms nothing until it is dragged through the system — by ignition priming, by the starter, or by being driven. To leave the vehicle that way, call Petrol in Diesel and leave the engine alone. What petrol really does to a diesel, how to gauge how far it's travelled, and how to stop it from happening a second time: that's the rest of this page.
What petrol in a diesel does to the motor
Passing through an engine, diesel is doing two things at the same time. It ignites, and before it burns it lubricates. What keeps the surfaces inside the high-pressure fuel pump and the injectors from wearing against each other is the diesel flowing through them — they're built to extremely fine gaps.
Poorly at the first, not at all at the second: that is petrol. The rattling comes from petrol being made not to ignite when compressed, which is exactly the opposite of what a diesel needs. On top of that it is thinner than diesel, it strips out the protection your system rests on, and any pump working on that mixture is wearing itself.
The shape of the problem is clear when you put those together. Not contact but movement is what does the harm. Where the petrol is only inside your tank, it is an issue of fuel, nothing more. The start of a mechanical problem is a pump that has been working on that petrol — and whatever a worn pump sheds moves on with the fuel to your injectors downstream.
Four scenarios our technicians see in Galgate: how bad is petrol in a diesel?
The best case there is: filled up, never started. At a forecourt, and really only there, the petrol is still limited to that tank — because everywhere else your car was driven to get to it. The job is draining and rinsing on the spot.
Ignition on, or started for a second. Once primed, the fuel system has drawn petrol out of that tank up to your filter and your lines. Normally little more than draining, cleaning and seeing to your filter, so still straightforward.
Those few miles on the road meant the pump running on fuel thinned by petrol throughout. The work is your tank, your lines, the fuel filter and clean fuel through the whole system, and how hard the car was driven matters as much as how far. A school run to Ellel St John the Evangelist Church of England Primary School is one matter. A run as far as Lancaster, under 5 miles away, is a very different task. So is any miles on the M6, under a mile from Galgate, where your engine has been working hard the whole time.
Driven until it complained. Clattering, an uneven idle, smoke, a throttle that has gone soft. The fuel isn't acting like diesel any more, and your engine is saying so. Stop where you are — on the verge on Stoney Lane, at the kerb, down a side road — and do not move it. A vehicle stopped quickly very seldom has lasting damage, since the drain and the flush-through, which still go first, deal with it.
Galgate people and the petrol in a diesel myths they hear
It will not be fine. The myth: "Fill it the rest of the way with diesel and it will be." Nothing is removed when you top up — that tank just holds more of the same mixture. That guidance presumes a diesel fuel system tolerates petrol by percentage. It does not.
Myth: a modern diesel copes with a bit of petrol. Rather, the reverse. More precise components and higher pressure are how a modern diesel runs its fuel, and that makes the lubrication matter more, not less.
The myth that catches motorists out: if it starts and drives, it must be unharmed. Any petrol engine fed diesel generally won't run, so the driver stops and the harm stops with them. While your pump wears, a diesel fed petrol normally starts, ticks over and drives away as if nothing has happened. A running engine doesn't mean fine.
Myth: "Add some two-stroke oil and drive the vehicle home." It is an old fix for a different problem. What petrol has weakened remains weakened, and the petrol stays inside the tank anyway.
The next start draws petrol back round your pump out of your lines and your filter, where some of it sits once the motor has run. That's why draining your tank yourself doesn't sort it — a myth. Clearing petrol into a can by the roadside is also really risky.
How it happens: petrol in a diesel
On purpose? Never. Through carelessness? Rarely, if ever. The forecourt makes it simple: the petrol nozzle is the smaller of the two, and it slides into a diesel filler with almost no resistance, whilst a diesel nozzle generally will not go into a petrol vehicle at all. So the slip runs one way.
It takes place when habit and the vehicle stop matching. Any vehicle that is new to you — hired, on loan as a courtesy car, or just bought. One petrol and one diesel on the driveway of the same household. The pumps in a different order on a familiar forecourt. Racing for a train outside Lancaster and filling up en route. Precisely the moment it takes place: after years of driving petrol, a driver fills a diesel Volkswagen Passat for the first time. Add rain, a phone call or a back seat full of kids, and your hand does what it has always done.
Avoiding petrol in a diesel next time you fill up around Galgate
- Green for unleaded and black for diesel is usual in the UK — but not on every forecourt. Go by the label on the petrol pump, not the colour.
- In a car you don't know, look inside the flap over your filler or at the cap before your first fill: many motors state the fuel there.
- Label the key. In a household with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of meaning to remember.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the petrol pump. It seems daft and it does the trick.
- Mistakes like this are simple to make while your mind is on something else, and so your phone goes away.
- Some diesels have a filler built to refuse a petrol nozzle, and devices you can add are available for motors without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop checking the petrol pump.
- Less petrol means a weaker blend, and so stop the moment you realise — though remembering that the next step is unchanged. It is still not to fire it up.
Put petrol in a diesel in Galgate already?
Short and simple, then, is the order of things. Leave it unstarted, with your ignition off too. The attendants at the forecourt — whether at Bailrigg Motors itself or wherever you filled up — will normally help roll it clear of the petrol pump if you ask. Next, 0333 366 0103. We'll ask what got in, roughly how much, and if it has been run.
If it was AdBlue instead of petrol, say so. That's a different problem — corrosion and deposits rather than lost lubrication — and it has its own page for Galgate.
One petrol in a diesel job in Galgate costs more than another. Why?
Four different jobs sit behind the four scenarios above — which is why there's no honest single price. Which of them you're in is mostly what moves the cost. Two things follow that: the petrol that went in as a share of what that tank holds, then the place your car is in and whether our van can get to it safely.
Three questions come first, before any quote, instead of after — what got in, how much, has it run — and this is the reason. Given those replies, you get a straight figure instead of a range.
About Galgate, briefly
Galgate is a village in Lancashire, situated near the coast and approximately 4 miles from Lancaster. Galgate has a population of around 1838 people and is characterised by semi-detached housing. Galgate sits at an elevation of 23 metres, close to the nearby villages of Ellel, Hampson Green, and Smith Green.
Fuel drain cover around Galgate and across Lancashire
Petrol in diesel jobs in Galgate — part of the LA postcode area — go to vans that also cover the places about it, Ellel, Hampson Green and Smith Green included. No need to move the vehicle to us. Forecourts, supermarket car parks, lay-bys and your own drive are all locations we drain.
Galgate: still at the petrol pump?
Nothing beats it: that is where you now are. Phone, and leave it switched off.