How Worried Should You Be? Petrol in a Diesel Car in Pategill
Not started? Then less anxious than you probably feel. "Have I wrecked it?" is the first question everyone in Pategill asks, and the honest answer is normally no, since petrol left in a diesel tank hurts nothing until it's dragged through the system — by ignition priming, by your starter, or by being driven. Keep it like that: leave the motor off and ring Petrol in Diesel. Further down, you will find what petrol really does inside a diesel, how far it may have gone, and how to stop it happening to you again.
The engine and petrol in a diesel: what happens
Two tasks fall to diesel on its journey round a motor. Oiling comes before burning; it does both. Very fine clearances go into your injectors and your high-pressure pump, and only your diesel flowing through keeps their surfaces from grinding together.
Poorly at the first, not at all at the second: that is petrol. Being less viscous than diesel, petrol strips out the lubrication a fuel system needs, leaving a pump running on that mixture wearing itself. It's also made to resist igniting under compression — the reverse of what a diesel needs — which is why you get the rattling.
Combined, those leave the shape of the trouble plain. The harm is done by circulation, not by contact. Where the petrol is only in that tank, it is an issue of fuel, nothing more. A pump that has been working on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds travels on with your fuel to your injectors downstream.
Petrol in a diesel in Pategill: how bad is it? Four cases
Filled but never started — the best it gets. At a forecourt, and really only there, the petrol is still limited to that tank — because everywhere else the car was driven to get to it. The task is emptying and purging on the spot.
Ignition on, or started for a moment. With the fuel system primed, the lines and filter now contain petrol that came from the tank. Still normally simple: drain, flush, and the fuel filter sorted.
Some miles driven, and the pump has spent each of them running on weakened fuel. The work is the tank, the lines, your filter and fresh fuel through the whole circuit, and how hard the vehicle was driven counts as much as how far. The school run to Beaconside CofE Primary School is one matter. A run as far as Carlisle, under 25 miles away, is a very different task. So is any mileage on the M6, under a mile from Pategill, where your engine has been labouring hard throughout.
Clattering, a lumpy idle, smoke, a throttle gone soft: driven until it complained. The fuel is not behaving like diesel any more, and your engine is saying so. Stop where you are — on the verge on Cumberland Place, at the kerb, down a side road — and don't move it again. A vehicle pulled over quickly very rarely has long-term damage, as the fuel drain and the flush-through, which still come first, take care of it.
Petrol in a diesel myths Pategill people hear
"Top it up the rest of the way with diesel and it'll be fine" — a myth. It will not. Topping up takes out nothing; it gives you a fuller tank of the same mix. Percentage isn't how a diesel fuel system tolerates petrol, whatever that guidance supposes.
"Newer diesels can handle a little petrol" — a myth, and nearer the reverse. At higher pressure, through finer components: that is how a modern diesel handles its fuel, so the protection matters more, not less.
Myth: "If it starts and drives, there's no harm done." This is the one that catches people. The driver of a petrol motor fed diesel normally has no choice but to stop, because it will not run, and the harm stops with them. Feed petrol to a diesel and it normally fires up, idles and pulls away as if nothing happened — all while its pump wears. A running engine doesn't mean fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a distinct issue. The petrol is still inside your tank afterwards, and whatever it has diluted is not put back.
"Drain it yourself and you are sorted" — a myth, because after it's been running some petrol lies in the fuel filter and lines, ready to go right back through the pump at the next start. And, a can of petrol filled at the roadside is truly risky.
How petrol ends up: petrol in a diesel
It's seldom carelessness, and no one does it on purpose. The forecourt makes it simple: the petrol nozzle is the narrower 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 car at all. So the mistake runs one way.
Routine and your car falling out of step is how it takes place. A new motor, a hire car or a courtesy car. A household with one petrol and one diesel on the drive. A forecourt you know, but with its pumps laid out differently. A train to catch, and a rushed fill on the way to Penrith. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is precisely the moment it occurs. The hand does what it has always done once you add rain, a phone call or a back seat full of kids.
Pategill 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 each forecourt. The label is what matters.
- Plenty of vehicles state the fuel inside your filler flap or on the cap, and so check it on your first fill in a vehicle you do not know.
- A coloured fob or a sticker on the diesel's key does more than any amount of intending to remember, for a house with one of each.
- It seems silly and it does the trick: on your first fill in a new or hired car, say "diesel" out loud before you lift the nozzle off the petrol pump.
- Tuck the phone away. This is an easy mistake to make whilst you are thinking about something else.
- Up to a point, a misfuel inhibitor helps: some diesels have a filler designed to refuse a petrol nozzle, and aftermarket devices exist for the remainder. Count it as a backstop, and keep reading the pump.
- Less petrol makes a thinner blend, so stop as soon as you realise — though remembering that the next step is unchanged. It is still not to start the car.
Pategill: already put petrol in a diesel?
Then the order of things is brief. Leave it unstarted, with your ignition off too. The staff on the forecourt — whether at Shell itself or wherever you filled up — will usually help roll it clear of the pump if you ask. Then ring 0333 366 0103 and tell us what got in, about how much, and whether it's run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a separate fault — Pategill has a page all for it.
Pategill petrol in a diesel tasks: why one costs more than another
There's no fair single quote for this, since the four situations above are four separate jobs. The scenario itself does most of the work of moving the cost. Two things follow that: the petrol that was put in as a share of what the tank holds, then the place the vehicle is in and whether a technician can reach it safely.
What got in, how much, and if it's run — three queries we ask before quoting, not after, for precisely that reason. The answers change a range into a straight figure.
About Pategill, for a moment
Pategill is a suburban area situated on the riverside in Cumbria, with a mix of semi-detached housing and other residential properties. Pategill sits at an elevation of 137 metres, near the cities of Carlisle and Penrith, and is part of the wider North West region. Pategill is located close to nearby places such as Carleton and Scaws, and is approximately 243 miles from London. Pategill has a population of around 4011 people, living in a variety of homes, predominantly semi-detached.
Fuel drain cover across Cumbria, Pategill included
Our vans answering petrol in diesel call-outs in Pategill, in the CA postcode area, also work the locations around it, Carleton, Scaws and Penrith among them. The car does not need to move to us: our engineers drain on a forecourt, in a supermarket car park, in a lay-by or on your own drive.
Still at the petrol pump around Pategill?
The best place there is, then — that is where you are. Call, and leave it switched off.