Petrol in a Diesel Car in Parr Brow: How Worried Should You Be?
If it has not been started, you can worry far less than you probably are. Everyone around Parr Brow begins with "have I wrecked it?", and the fair answer is usually no: petrol left in that tank of any diesel remains harmless till priming, cranking or driving draws it into your fuel system. Leave your engine off then phone Petrol in Diesel — that is how you keep it that way. Read on for three things: the effect petrol has inside a diesel engine, the signs of how far it has got, and ways to make sure you never repeat it.
Inside the engine: what petrol in a diesel does
Passing through a motor, diesel is doing two jobs at once. It lubricates to begin with, and only then does it burn. Extremely fine clearances are built into the injectors and the high-pressure fuel pump, and only the diesel running through stops their surfaces grinding together.
Poorly at the first, not at all at the second: that's petrol. A pump working on a petrol mix is wearing itself out, because petrol is runnier than diesel and strips out the lubrication your fuel system relies on. Petrol is also made to resist igniting under compression — the reverse of what a diesel wants from its fuel — and that is where the rattling starts.
Combined, those make the shape of the issue plain. Contact doesn't do the damage — circulation does. All a tank with petrol in it amounts to is a fuel issue. After your pump has been running on that petrol, a mechanical fault has begun: whatever is shed by a pump that is wearing travels onward to the injectors with the fuel.
Petrol in a diesel in Parr Brow: how serious is it? Four situations
Fuelled but not once started — as good as it gets. That petrol is in that tank and only the tank, and the task is a drain and a flush where the car stands. This is the one scenario that can only truly happen on a forecourt, because anywhere else your car has been driven to get there.
The ignition switched on, or a brief start. Once primed, the system has pulled petrol out of your tank as far as the fuel filter and the fuel lines. That is normally still an easy task — a drain, a flush, and your filter dealt with.
Driven a few miles. Now the pump has spent those miles working on diluted fuel. Tank, lines, filter, then fresh fuel run through the whole circuit: that is the work, and the way your car was driven counts as much as the mileage. The school run to Garrett Hall Primary School is one thing. Very different once more: a trip to Salford, under 10 miles away, or any distance on the M61, under 3 miles from Parr Brow, where the engine kept labouring hard.
It protested, and only then stopped: smoke, rattling, a throttle gone soft, an idle gone lumpy. The fuel isn't acting like diesel any more, and your motor is telling you. Leave it where it stops: a lay-by, a side street, the verge on Makants Close. Permanent damage is very unusual if a car is stopped quickly, and the drain and flush-through that still come first deal with it.
Petrol in a diesel myths Parr Brow motorists hear
"Top it up the rest of the way with diesel and it will be fine" — a myth. It won't. Nothing is removed when you top up — that tank just carries more of the same blend. That guidance presumes a diesel fuel system tolerates petrol by percentage. It doesn't.
"Modern diesels can handle a little petrol" — a myth, and nearer the reverse. Protection matters more on current diesels, not less, since their fuel passes through more precise components at higher pressure.
This is the one that catches drivers. Myth: "If it starts and drives, there is no harm done." Any petrol engine fed diesel generally will not run, and so the motorist stops and the harm stops with them. Nothing seems to have happened when a diesel fed petrol fires up, ticks over and drives away, as it usually does; meanwhile the pump grinds. Running is not the same as fine.
Myth: "Add some two-stroke oil and drive it home." It's an outdated fix for a distinct problem. None of what petrol weakened is put back by it — and afterwards, that tank still contains that petrol.
"Drain it yourself and you are sorted" — a myth, since after it has been running some petrol lies in the filter and lines, waiting to go right back through the pump on your next start. It's also truly dangerous to drain petrol into a can at the kerbside.
How it happens: petrol in a diesel
Nobody does it on purpose, and it is rarely carelessness. The petrol nozzle is the narrower of the two and slides into a diesel filler with almost no resistance; a diesel nozzle mostly won't go into a petrol motor at all. The forecourt makes it easy, and the slip runs one way.
The moment habit stops matching the car is the moment it occurs. A new vehicle, a hire car or a courtesy car. One petrol and one diesel on the drive of the same household. A forecourt you know, only with its pumps arranged differently. A train to catch, and a rushed fill en route to Walkden. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is precisely the moment it happens. Your hand does what it has always done when you add rain, a phone call or a back seat full of children.
Parr Brow people: how to prevent petrol in a diesel next time
- Not every forecourt in the UK follows green for unleaded and black for diesel, even if most generally do. Check the pump's label; the colour is just a clue.
- In a vehicle you don't know, look inside the flap over your filler or at the cap before your first fill: many cars print the fuel type there.
- Good intentions count for less than a sticker or a fob in a bright colour on your diesel's key if a household has one of each. So mark it.
- Before the nozzle comes off the petrol pump the first time you fuel a hired or new vehicle, say "diesel" out loud. Silly, perhaps, but it works.
- Mistakes like this are straightforward to make while your mind is on something else, so your phone goes away.
- Add-on devices exist for vehicles without one, and some diesels come with a filler that will not accept a petrol nozzle. Helpful — but a backstop at best, never a reason to stop checking the label.
- Stop the moment you notice. Less petrol in your tank means a weaker blend. It does not change what to do next, which is still not to start the vehicle.
Petrol already in a diesel in Parr Brow? Begin here
Short and simple, then, is the order of things. Do not crank it, and do not switch your ignition on. Yet on the forecourt, at Esso or anywhere else? Ask the staff to help you push it away from the pump. Then phone 0333 366 0103 and tell us what got in, about how much, and whether it has run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a different fault — Parr Brow has a page all for it.
Why one petrol in a diesel job around Parr Brow costs more than another
There's no fair single price for this, since the four situations above are four separate jobs. Chiefly, your cost shifts with which one you're in. Two things follow that: the petrol that got in as a share of what that tank holds, then the spot the car is in and whether our van can get to it safely.
Three queries come first, before quoting, instead of after — what was put in, how much, has it run — and this is the reason. The answers turn a range into a straight figure.
About Parr Brow and its setting
Parr Brow is a suburban area in Greater Manchester, situated on the riverside at an elevation of 66 metres. Parr Brow lies approximately 6.2 miles from Salford and is surrounded by nearby places such as Mosley Common and New Manchester. Parr Brow has a population of around 3696 people and predominantly features semi-detached housing. Parr Brow is located in the North West region of England, about 169.2 miles from London.
Across Greater Manchester and in Parr Brow: fuel drain cover
Parr Brow sits in the M postcode area, and the teams that answer petrol in diesel calls there work the places around it as well — Mosley Common, New Manchester and Engine Fold among them. A forecourt, a supermarket car park, a lay-by or your own drive are all spots we drain, and your car doesn't need to move to us.
At the petrol pump around Parr Brow, right now?
In that case, you could not be in a better spot. Ring, and keep it switched off.