Petrol in a Diesel Car in Pollokshields: How Worried Should You Be?
Likely less than you already are — as long as no one has started the vehicle. Everyone around Pollokshields starts with "have I ruined it?", and the honest answer is usually no: petrol resting inside that tank of any diesel stays harmless until priming, cranking or driving draws it into your fuel system. To keep it that way, call Petrol in Diesel then leave your engine alone. Read on for three things: the effect petrol has inside a diesel motor, the signs of how far it has spread, and ways to make sure you don't repeat it.
Inside your engine: what petrol in a diesel really does
Two tasks fall to diesel on its journey round a motor. Before it burns, it protects — and then it ignites. What keeps the surfaces inside the high-pressure pump and your injectors from wearing down against each other is your diesel passing through them — they're made to very fine gaps.
Poorly at the first, not at all at the second: that's petrol. Being less viscous than diesel, petrol strips away the lubrication a fuel system needs, so a pump running on that mixture to wear itself. It is equally made to resist igniting under compression — the reverse of what a diesel needs — which is where you get the clattering.
The shape of the issue is plain when you put those together. It's movement that causes the damage, not contact. Where that petrol is only inside the tank, it's a problem of fuel, nothing more. Whatever a worn pump sheds travels on, borne by your fuel, into the fuel injectors downstream, which is why a pump that has worked on that petrol is where a mechanical fault starts.
Four situations our engineers see in Pollokshields: how serious is petrol in a diesel?
Filled up, and never started: nothing beats it. The petrol is inside that tank and only that tank, and the job is a drain and a flush where the car sits. This is the one situation that can only truly happen on a forecourt, because anywhere else the car has been driven to get there.
Started for a moment, or just the ignition on. Your system has been bled, and so petrol has left the tank and got to your filter and the fuel lines. Drain, flush, see to the fuel filter: still usually simple.
Those few miles driven were the pump labouring on fuel weakened by petrol throughout. How hard your car was driven matters as much as how far, and this work covers the tank, the lines, your filter and clean fuel through the entire system. On the school run to the local primary school, the mileage is short. Driving as far as Glasgow, under 3 miles away, makes a very different job — as does any mileage on the M77, under a mile from Pollokshields, with your engine working hard the whole time.
It complained, and only then stopped: smoke, knocking, a throttle gone soft, an idle gone uneven. The fuel is not acting like diesel any more, and the motor is saying so. Pull up wherever you are — the verge on Hamilton Avenue, a lay-by, a side street — then leave the vehicle where it is. Permanent damage is very unusual when a vehicle is stopped soon, and the drain and flush-through that still go first deal with it.
Petrol in a diesel stories Pollokshields 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 by topping up — you are left with a fuller tank, still the same mixture. Percentage isn't how a diesel fuel system copes with petrol, whatever that advice presumes.
Not so: a newer diesel copes with a bit of petrol. Rather, the opposite. Smaller parts and higher pressure are the way a modern diesel runs its fuel, and that makes the protection count more, not less.
Myth: "If it starts and drives, there's no damage done." This is the one that catches motorists. Any petrol motor fed diesel generally won't run, so the motorist stops and the harm stops with them. A diesel fed petrol generally starts, ticks over and drives away as if nothing has happened, while the pump grinds. Fine and running aren't the same thing.
An outdated fix for a separate fault lies behind this one. Myth: "Add some two-stroke oil and drive the car home." None of what petrol weakened gets put back by it — and later, your tank still holds that petrol.
Myth: "Drain the tank yourself and you're sorted." After your engine has been run, some of the petrol is no longer inside that tank: it is in the fuel filter and the lines, and it goes straight back through your pump at your next start. Draining petrol into a can at the kerbside is also really hazardous.
Why petrol in a diesel occurs at all
Nobody does it on purpose, and it is rarely carelessness. A diesel nozzle generally will not fit a petrol vehicle, but the narrower petrol nozzle goes into the filler of a diesel nearly without resistance — so forecourts make this one error simple, and just in one direction.
The moment routine stops matching the car is the moment it takes place. Hire cars, courtesy cars, and vehicles that are new to you. 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 Maxwell Park. The first fill-up in a diesel Volkswagen Golf after years of driving petrol is exactly the moment it happens. The hand does what it has always done once you add rain, a phone call or a back seat full of kids.
Pollokshields drivers: how to avoid petrol in a diesel next time
- 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.
- The first fill in an unfamiliar car is the time to check the filler flap — inside it, or on the cap, plenty of vehicles state which fuel they take.
- Good intentions count for less than a sticker or a fob in a bright colour on the diesel's key if a house has one of each. So mark it.
- Before the nozzle leaves the petrol pump the first time you fuel a hired or new vehicle, say "diesel" aloud. Daft, perhaps, but it does the trick.
- While you are thinking about something else, this is an easy mistake to make — so put your phone away.
- Some diesels have a filler built to reject a petrol nozzle, and devices you can add are available for vehicles without one. Such an inhibitor helps up to a point — as a backstop, not a reason to stop checking the petrol pump.
- Spotting it mid-fill? Stop there and then. A thinner mix results from less petrol inside the tank, but your next step remains the same: don't crank it.
Already put petrol in a diesel around Pollokshields?
In that case, there's just a short order of things. Do not switch the ignition on, and do not crank it. Ask the attendants to help you roll it away from the petrol pump if you're still on the forecourt, whether that's BP or somewhere else. Phone 0333 366 0103 next, with three answers — the fuel, the approximate quantity, and whether it's run.
Say so if it was AdBlue rather than petrol: it is a different issue, with its own page for Pollokshields, because AdBlue brings corrosion and deposits rather than lost lubrication.
What makes one Pollokshields petrol in a diesel task cost more than the next
There's no fair single price for this, because the four situations above are four separate jobs. The scenario itself does most of the work of moving the cost. After that it's the proportion — how much petrol went in against how much your tank holds — and then where the car is and whether a technician can get to it safely.
Ahead of any quote, not after, come three questions: your fuel that went in, its volume, and whether it's run. That is why. With the replies, you get a straight figure instead of a range.
About Pollokshields itself
Pollokshields is a suburban area in Glasgow City, situated approximately 2.6 miles from Glasgow city centre. Pollokshields is characterised by its predominantly flat-type housing and is located near other nearby places such as Crossmyloof, Dumbreck, and Strathbungo. Pollokshields has a relatively low elevation of 27 metres above sea level, and is home to around 4722 residents. Pollokshields is also relatively distant from London, at around 344 miles away.
Pollokshields and Glasgow City: where our fuel drain cover reaches
Crossmyloof, Dumbreck and Strathbungo are among the places around Pollokshields that the same vans work, answering petrol in diesel calls across Pollokshields's G postcode area. Our engineers drain wherever the vehicle is — your own drive, a lay-by, a supermarket car park, a forecourt — so it does not have to come to us.
At the petrol pump around Pollokshields, still?
Then you're in the best place there can be. Keep it off. Call.