How Worried Should You Be? Petrol in a Diesel Car in Stathern
Less than you probably are, if it has not been started. Everyone in Stathern starts with "have I wrecked it?", and the honest answer is generally no: petrol resting in that tank of a diesel remains harmless till priming, cranking or driving draws it into the fuel system. Keep it that way: leave your motor off then phone Petrol in Diesel. The remainder of this page explains what petrol really does to a diesel, how to judge how far it has got, and how to make sure it doesn't happen to you again.
Inside the motor: what petrol in a diesel really does
Passing through a motor, diesel is doing two things at once. It ignites, and before it combusts it protects. Built to extremely fine clearances, your injectors and the pump depend on the diesel flowing through them to keep their surfaces from wearing against one another.
Poorly at the first, not at all at the second: that's petrol. A pump working on a petrol mix is wearing itself out, since petrol is thinner than diesel and takes away the protection the 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's where the knocking starts.
The shape of the issue is plain once you put those together. It's movement that does the harm, not contact. Where the petrol is only inside that tank, it's a fault of fuel, nothing more. A pump that has been labouring on that petrol is the beginning of a mechanical one, and whatever a worn pump sheds moves on with the fuel to the fuel injectors further on.
How bad is petrol in a diesel? Four situations our technicians see around Stathern
The best case there can be: filled up, not once started. The petrol is inside that tank and only that tank, and the job is a drain and a flush where the car stands. This is the one situation that can only truly take place at a forecourt, because anywhere else the vehicle has been driven to get there.
Ignition on, or started for a moment. Petrol has come out of the tank and got to the filter and the fuel lines, since your system has been primed. Drain, flush, see to the filter: still usually easy.
Your pump now spent a couple of miles on thinned fuel — that is what driving the car meant. How hard your car was driven matters as much as how far, and this work takes in that tank, the fuel lines, the filter and fresh fuel through the entire circuit. On the school run to Stathern Primary School, the distance is short. A run as far as Nottingham, under 15 miles away, is a very different job. So is any mileage on the M1, under 25 miles from Stathern, where the motor has been running hard throughout.
Driven on till it complained — rattling, smoke, a lumpy idle, a soft throttle. The engine is telling you your fuel is no longer behaving like diesel. Leave it where it stops: a lay-by, a side street, the verge on Narrow Lane. A vehicle pulled over quickly very seldom has long-term damage, since the fuel drain and the flush, which still go first, sort it out.
Myths Stathern drivers hear about petrol in a diesel
Myth: topping up to full with diesel makes it fine. It does not. Nothing is removed by topping up — you're left with a fuller tank, still the same mixture. A diesel fuel system doesn't tolerate petrol by percentage in the way that advice presumes.
Myth: "A modern diesel can cope with a bit of petrol." If anything, the opposite. Protection counts more on current diesels, not less, since their fuel passes through smaller parts at higher pressure.
This is the one that fools motorists. Myth: "If it starts and drives, there's no harm done." The driver of a petrol motor fed diesel normally stops, because it will not run, and the damage stops with them. Feed petrol to a diesel and it normally fires up, ticks over and drives away as if nothing happened — all while its pump is wearing. Running 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 fault. What petrol has weakened stays diluted, and the petrol remains inside the tank regardless.
The next start sends petrol back round the pump from the lines and your filter, where some of it ends up once the engine has been run. That is why draining your tank yourself doesn't sort it — a myth. Also, a can of petrol filled by the kerbside is truly hazardous.
Petrol in a diesel: how does it take place?
On purpose? Never. Through carelessness? Seldom, if ever. One way only, since of the nozzles: the slimmer petrol one slides inside a diesel filler with almost no resistance, whereas the diesel one generally will not fit a petrol motor. That is how the forecourt makes it straightforward.
The moment habit stops matching your car is the moment it takes place. A vehicle that's new to you — hired, on loan as a courtesy car, or brand new. A household with one petrol and one diesel on the drive. A forecourt you know, but with its pumps arranged differently. Racing for a train at Elton & Orston and filling up en route. The first fill-up in a diesel Volkswagen Passat after years of driving petrol is precisely the moment it occurs. Throw in a back seat full of kids, a phone call or rain, and habit takes over.
Preventing petrol in a diesel next time you fill up around Stathern
- 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 car you don't know, look inside the flap over your filler or at the cap before the first fill: plenty of motors state the fuel type there.
- One of each in the household? Mark the key to your diesel — a coloured fob, a sticker — because intending to remember is not enough.
- Before the nozzle leaves the pump the first time you fill a hired or new motor, say "diesel" aloud. Daft, yes, yet it works.
- Thinking about something else is when this becomes an easy mistake to make, so put your phone away then keep your mind on the petrol pump.
- Some diesels come with a filler designed to reject a petrol nozzle, and devices you can add exist for motors without one. Such an inhibitor helps up to a point — as a safety net, not a reason to stop reading the petrol pump.
- As soon as you notice, stop: less petrol inside that tank means a weaker mixture. What to do next doesn't change, though — still do not crank it.
Stathern: already put petrol in a diesel?
Then the order of things is brief. Do not turn the ignition on, and do not crank it. Ask the attendants to help you roll it away from the petrol pump if you are still at the forecourt, whether that is the nearest petrol station or somewhere else. Next, 0333 366 0103. We will ask what went in, roughly how much, and if it has been run.
AdBlue, not petrol? Then say so. Corrosion and deposits, not lost protection, make it a different fault — Stathern has a page just for it.
Why one petrol in a diesel job around Stathern costs more than another
A fair single price does not exist here: four scenarios, four separate tasks. Which of them you're in is chiefly what shifts the cost. Next it's the ratio — how much petrol was put in against how much your tank holds — and then where your car is and whether a van can reach it safely.
Three questions come first, before any quote, instead of after — what was put in, how much, has it run — and that is the reason. With those replies, you get a straight figure instead of a range.
About Stathern
Stathern is a small village in Leicestershire, situated in the East Midlands region of England, with a population of around 721 people. Stathern sits at an elevation of 78 metres, approximately 13.7 miles from Nottingham and 99.2 miles from London. Stathern is characterized by its predominantly detached housing stock, and is located near other villages such as Harby, Eastwell, and Plungar.
Across Leicestershire and in Stathern: fuel drain cover
Stathern sits in the LE postcode area, and the vans that answer petrol in diesel calls there work the spots near it as well — Harby, Eastwell and Plungar among them. The car doesn't need to come 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 Stathern?
The best spot there is, then — that is where you are. Turned off it remains; then call.