How Worried Should You Be? Petrol in a Diesel Car in Coney Hill
If it hasn't been started, you can worry less than you likely are. Everyone in Coney Hill starts with "have I ruined it?", and the honest answer is normally no: petrol resting inside your tank of any diesel stays harmless until priming, cranking or driving pulls it into the system. To leave it like that, phone Petrol in Diesel then leave the engine switched off. Further down, you will find what petrol actually does inside a diesel, how far it may have gone, and how to stop it happening to you again.
What petrol in a diesel does to the motor
Passing through a motor, diesel does two things at the same time. It protects to begin with, and only then does it burn. Designed to very fine clearances, your injectors and your pump rely on your diesel flowing through them to stop their surfaces wearing against one another.
Petrol does the first job badly and the second not at all. A pump working on a petrol blend is wearing itself out, because petrol is thinner than diesel and strips out the lubrication your fuel system relies on. Petrol is also designed to resist igniting under compression — the reverse of what a diesel wants from its fuel — and that's where any knocking comes.
Combined, those leave the shape of the issue clear. Not contact but circulation is what does the damage. All a tank with petrol in it amounts to is a fuel problem. A pump that has been working on that petrol is the start of a mechanical one, and whatever a worn pump sheds travels on with the fuel to your injectors further on.
Coney Hill, petrol in a diesel: four cases, from mild to significant
Filled up, and not started: nothing beats it. The petrol is in your tank and only that tank, and the task is a drain and a flush where the vehicle sits. This is the one scenario that can only truly occur at a forecourt, since anywhere else the vehicle has been driven to get there.
A brief spell of running, or merely the ignition on. Once primed, the system has pulled petrol from that tank as far as the filter and the fuel lines. Still generally easy: drain, flush, and your filter dealt with.
The pump has worked a couple of miles on weakened fuel — that is what driving it does. The work is that tank, your lines, the fuel filter and fresh fuel through the entire circuit, and how hard your car was driven counts as much as how far. On the school run to Coney Hill Community Primary School, the miles is small. Very different again: a trip to Gloucester, under 3 miles away, or any miles on the M5, under 3 miles from Coney Hill, where your engine kept running hard.
It complained, and only then stopped: smoke, clattering, a throttle gone soft, an idle gone lumpy. That is the motor telling you its fuel has stopped acting like diesel. Leave it wherever it stops: a lay-by, a side street, the verge on Vestry Gardens. What goes first is still the drain and flush-through, and that deals with it, with long-term damage very rare when a vehicle is stopped early.
Stories Coney Hill people hear about petrol in a diesel
Myth: "Fill it the rest of the way with diesel and it will be fine." It will not. Nothing comes out when you top up — that tank simply carries more of the same blend. A diesel fuel system doesn't tolerate petrol by percentage in the way that guidance presumes.
If anything, the reverse holds. Myth: "A current diesel can cope with a bit of petrol." Finer parts and higher pressure are the way a newer diesel runs its fuel, and that makes the lubrication matter more, not less.
This is the one that catches people. Myth: "If it starts and drives, there's no harm done." Diesel in a petrol motor usually means a motor that won't run: the driver stops, and so does the harm. Nothing looks to have happened when a diesel fed petrol fires up, ticks over and drives away, which it usually will; meanwhile your pump grinds. A running engine does not mean fine.
"A drop of two-stroke oil and drive it home" — a myth, borrowed from a fix from years ago, for a different problem. The petrol is still in your tank afterwards, and what it has weakened is not put back.
The next start sends petrol back round your pump out of your lines and your filter, where some of it sits once the engine has run. That is why draining the tank yourself doesn't leave you sorted — a myth. Also, a can of petrol filled at the roadside is truly risky.
Why petrol in a diesel takes place at all
On purpose? Never. Through carelessness? Rarely, if ever. One way only, since of the nozzles: the narrower petrol one slips 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.
When routine and the vehicle stop matching, it takes place. Courtesy car, hire car, or a motor that's brand new. Two cars on one driveway, one petrol, one diesel. Your usual forecourt, its pumps now in a different order. Rushing for a train outside Gloucester and fuelling up en route. Years of petrol motors behind you, a diesel Volkswagen Golf in front of you on the forecourt for its first tank — that is when. Add a back seat full of children, a phone call or rain, and habit wins.
Preventing petrol in a diesel next time you fill up in Coney Hill
- Read the pump, not the colour. In the UK unleaded handles are generally green and diesel black, but not on each forecourt. The label is what counts.
- The first fill in a strange car is the time to check the filler flap — inside it, or on the cap, plenty of motors state which fuel to use.
- Label the key. In a home with one of each, a coloured fob or a sticker on the diesel's key does more than any amount of intending to remember.
- Say it before you lift it. On your first fill in a new or hired car, say "diesel" aloud before you take the nozzle off the petrol pump. It sounds daft and it works.
- Put your phone away. This is an easy mistake to make while you are thinking about something else.
- Some diesels have a filler built to block 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.
- As soon as you notice, stop: less petrol inside the tank makes a weaker blend. What to do next doesn't change, though — still don't start it.
Put petrol in a diesel in Coney Hill already?
Then, there is just a short order of things. Do not switch your ignition on, and don't crank it. Ask the staff to help you push it clear of the pump if you are still at the forecourt, whether that's Esso or anywhere else. Then ring 0333 366 0103 and tell us what went in, roughly how much, and whether it has run.
If it was AdBlue rather than petrol, say so. That is a separate issue — corrosion and deposits and not lost lubrication — and it has its own page for Coney Hill.
Why one petrol in a diesel task in Coney Hill costs more than another
The four scenarios above are four different tasks, so no single price for this would be honest. Mostly, the cost moves with which one you are in. Beyond that it's the ratio — how much petrol went in against how much that tank holds — and then where your car is and whether a van can reach it safely.
Three questions come first, before quoting, instead of after — what got in, how much, has it run — and this is the reason. Those answers are what change a range into one firm number.
About Coney Hill and its setting
Coney Hill is a suburban area located on the outskirts of Gloucester, near the lakeside and at an elevation of 39 metres. Coney Hill sits close to nearby places such as Saintbridge, Barnwood, and Robinswood, and is approximately 1.6 miles from Gloucester city centre. Coney Hill is characterized by its predominantly semi-detached housing stock, which reflects the typical residential development of the area. Coney Hill is also situated within commuting distance of major cities, with London being around 92.6 miles away.
Across Gloucestershire and around Coney Hill: fuel drain cover
Saintbridge, Barnwood and Robinswood are among the spots around Coney Hill that the same vans work, answering petrol in diesel call-outs across Coney Hill's GL postcode area. We drain wherever your car is — your own driveway, a lay-by, a supermarket car park, a forecourt — so it never needs to come to us.
Still at the petrol pump around Coney Hill?
No position is better: that is where you now are. Keep the vehicle turned off, then ring.