How Worried Should You Be? Petrol in a Diesel Car in Bryn Gates
Far less than you likely are, if it has not been started. Petrol resting in a diesel tank does nothing to the motor till something pulls it through the system — the ignition priming the pump, your starter, or the drive itself. So the fair answer to the first query anyone around Bryn Gates asks, "have I ruined it?", is generally no. Keep it that way: leave the motor off then ring Petrol in Diesel. Further down, this page sets out what petrol really does inside a diesel, how far it might have got, and how to stop it happening to you again.
Inside the motor: what petrol in a diesel does
Passing through an engine, diesel is doing two jobs at once. It ignites, and before it ignites it protects. Built to very fine gaps, your injectors and your pump rely on the diesel moving through them to stop their surfaces wearing against one another.
Petrol handles the first job poorly and the second not at all. It's runnier than diesel and strips away the protection your fuel system hinges on, and so a pump running on a petrol mixture is a pump wearing itself. And petrol is designed to resist igniting under compression, which is the reverse of what a diesel needs from its fuel. That is where the knocking comes from.
Put these together and the shape of the issue is clear. It is circulation that causes the harm, not contact. All a tank with petrol in it amounts to is a fuel fault. A pump that has been labouring on that petrol is the start of a mechanical one, and whatever a worn pump sheds travels on with your fuel to your injectors further on.
How bad is petrol in a diesel? Four scenarios our engineers see in Bryn Gates
The best case there is: filled up, not once started. Being at a forecourt is what makes this possible: elsewhere, the vehicle has been driven there to begin with. With that petrol kept inside that tank alone, it's emptied and rinsed on the spot, and nothing more is needed.
Started for a second, or only the ignition on. Once primed, the fuel system has drawn petrol out of your tank as far as the fuel filter and your lines. Drain, flush, deal with the filter: still usually simple.
Some miles driven, and the pump has spent each of them labouring on diluted fuel. The work is your tank, your lines, your filter and clean fuel through the whole system, and how hard the car was driven matters as much as how far. Short trips, such as the school run to Holy Family Catholic Academy, are one thing. A run as far as Salford, under 15 miles away, is a very different job. So is any miles on the Bryn Spur, under 3 miles from Bryn Gates, where the motor has been working hard throughout.
It complained, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone ragged. The fuel isn't acting like diesel any more, and the engine is telling you. Leave it where it has stopped: a lay-by, a side street, the verge on Crown Wood Court. Permanent damage is very unusual if a vehicle is stopped quickly, and the drain and flush-through that still come first sort it out.
Petrol in a diesel myths Bryn Gates drivers hear
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. A fuller tank of the same mix is all it gives, because topping up removes nothing. The idea behind that advice — that diesel fuel systems accept petrol by percentage — is wrong.
"Newer diesels can handle a little petrol" — a myth, and closer to the opposite. A current diesel runs its fuel through smaller components at higher pressure, which makes the protection count more, not less.
The myth that catches drivers out: if it starts and drives, it must be unharmed. The driver of a petrol engine fed diesel usually has no choice but to stop, since it will not run, and the harm stops there. A diesel fed petrol normally starts, idles and drives away as if nothing has happened, whilst your pump wears. Fine and running aren't the same thing.
An outdated fix for a distinct issue lies behind this one. Myth: "Add some two-stroke oil and drive it home." What petrol has weakened stays thinned, and the petrol stays inside the tank regardless.
"Drain it yourself and you're sorted" — a myth, since after it's been running some petrol lies in the fuel filter and lines, ready to go straight back through your pump at the next start. It is also truly risky to drain petrol into a can at the roadside.
Petrol in a diesel: how does it occur?
A careless moment is seldom the cause, and no one means to do it. The petrol nozzle is the narrower of the two and slides into a diesel filler with almost no resistance; a diesel nozzle generally won't go into a petrol vehicle at all. The forecourt makes it easy, and the slip runs one way.
The moment routine stops matching the car is the moment it occurs. A car that is new to you — hired, on loan as a courtesy car, or just bought. Two cars on one drive, one petrol, one diesel. A well-known forecourt with the pumps in a different order. A train to catch, and a rushed fill en route to Bryn. Years of petrol motors behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that is when. Throw in rain, a phone call or a back seat full of children, and the hand repeats what it has always done.
Next time you fill up around Bryn Gates: avoiding petrol in a diesel
- Check the petrol pump, not the colour. In the UK unleaded handles are normally green and diesel black, but not on each forecourt. The label is what counts.
- Many motors state the fuel type inside your filler flap or on the cap, and so check there on the first fill in a vehicle you don't know.
- Mark your key. In a household with one of each, a coloured fob or a sticker on your diesel's key does more than any amount of meaning to remember.
- "Diesel", aloud, before you pick up the nozzle — each time a new or hired car gets its first tank. It seems silly. It does the trick.
- Whilst you are thinking about something else, this is an easy mistake to make — so put your phone away.
- Add-on devices are available for vehicles without one, and some diesels come with a filler that won't accept a petrol nozzle. Helpful — but a safety net only, never a reason to stop checking the label.
- Less petrol makes a thinner mix, and so stop as soon as you realise — though remembering that the next step is unchanged. It's still not to start the vehicle.
Bryn Gates: already put petrol in a diesel?
Then, there's only a short order of things. Starting it is out, and so is switching on the ignition. The attendants at the forecourt — whether at Esso itself or wherever you filled up — will usually help roll it away from the pump if you ask. Then call 0333 366 0103 and tell us what was put in, about how much, and if it's run.
Say so if it was AdBlue rather than petrol: it's a different problem, with its own page for Bryn Gates, because AdBlue brings corrosion and deposits instead of lost lubrication.
Bryn Gates petrol in a diesel tasks: why one costs more than another
There's no honest single quote for this, because the four situations above are four separate tasks. Chiefly, your cost moves with which situation you are in. The share matters next, meaning how much of that tank is petrol, and then the position of the car and whether getting to it is safe for our van.
What got in, how much, and whether it's run — three queries our technicians ask before quoting, not after, for exactly that reason. A range becomes a straight figure when those replies are in.
About Bryn Gates and its setting
Bryn Gates is a small village in Greater Manchester, situated inland at an elevation of 37 metres. Bryn Gates lies near several neighbouring communities, including Bamfurlong, Stubshaw Cross, and Abram. Bryn Gates is characterized by its predominantly terraced housing stock, reflecting its history of development in the region. Bryn Gates is located approximately 13 miles from the city of Salford and about 173 miles northwest of London.
Fuel drain cover across Greater Manchester, Bryn Gates included
The teams answering petrol in diesel calls around Bryn Gates, in the WN postcode area, also work the spots around it, Bamfurlong, Stubshaw Cross and Abram among them. Our engineers drain wherever your vehicle is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
In Bryn Gates and still at the pump?
No position is better: that is where you are. Call, and keep it switched off.