--- title: Next Steps: Petrol in a Diesel Car Upper Shirley canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/upper-shirley-greater-london/ location: Upper Shirley county: Greater London latitude: 51.366870 longitude: -0.052870 service: Petrol in a Diesel Car updated: 2026-10-26 --- # What Happens Now: Petrol in a Diesel Car in Upper Shirley Stop. Motor off. Leave it like that — no second on, no moving it at all. Has not been run? Then petrol in a diesel tends to be a simple drain-and-flush job wherever your vehicle has stopped — and no other factor decides that as much as the next few minutes do. Below is the sequence from here, wherever in Upper Shirley you happen to be. ## Motor off: minute one with petrol in a diesel In this sequence, all before everything else: - Priming your fuel system draws petrol from the tank toward the components it harms, and turning your ignition on can be enough to do that. So the keys come out, and the ignition remains off altogether. - No diesel on top. More fuel in removes none of the petrol — it just leaves you with more of the same mixture. - Hazard lights on. If you are at all close to moving traffic, make your car easy to see before you do anything else. - The attendants will generally help you push it clear of the pump. Let them, and roll it by hand — not on the motor, even for a few yards. - The first question you will be asked is which fuel went in and about how much — and the till receipt shows both. Hold on to it. On the M25, under 10 miles from Upper Shirley, the next junction is the place to leave the vehicle; elsewhere, the first sensible place to stop. Don't push on to the services. Then go back to stage one. ## Has it run yet? The fork in each Upper Shirley fuel drain One answer is what everything after this point depends on. Not run, not even once: - All the petrol sits in that tank, and just there. - Where your car sits is normally where the work is done: a drain, then a flush. - This, here, is the best position to be in, and the whole reason stage one counts. If the motor has run, even briefly: - The lines and the fuel filter now carry petrol pulled from that tank. - Run it further and that petrol reaches the fuel injectors, having gone through your fuel pump first. - The further it went, the bigger the job — your lines, the filter, and now and then more besides. Petrol does not lubricate. Diesel does, protecting your high-pressure pump and injectors as it flows through, which is why the line falls where it does. Nothing is damaged by petrol that is just resting in a tank. The parts that move it are wearing the moment petrol is being pumped. ## What to have prepared when you call about petrol in a diesel from Upper Shirley Get ready a little, and the van finds you rather than circling. - CR0 5 and the remainder of the postcode makes the ideal way to start telling us where you are. - A road name is a help: Upper Shirley Road, say, or whatever street you've stopped in. A car park works too. - What a car park serves is the easiest way to find it, and so mention the landmark — like the one outside Co-op Food. - That it is a diesel, along with the make and model of the vehicle. - What was put in. Petrol, or AdBlue. AdBlue is a separate job with its own page for Upper Shirley, and so say which. - How much. Litres from your receipt, or how long the nozzle was in. - Has it run? If so, tell us how far it got, and how it was driven. - Sort who has your car before we arrive: some hire or company contracts want the owner to approve this work, and doing it quicker first. Ring 0333 366 0103 next. Writing to works too if it can wait, with your car parked at home, going nowhere. ## Upper Shirley fuel drain on its way? While you wait In the wait, the damage comes from kindly meant help — so these matter. - Safety before the car. If it has stopped somewhere unsafe, get yourself away from the traffic and wait away from it. If it is safe where it is, wait with it. - A kind passer-by doesn't fire it up. Nor does anyone wanting to check it still works, or rolling it a few yards. - None of it takes that petrol back out — not two-stroke oil, not injector cleaner, not anything from your boot. So no additives. - Draining it yourself is out: a can of siphoned petrol on a verge is a danger, and your fuel beyond your tank stays put anyway. - Not for the radio, not for your windows: your ignition stays off. ## Step by step: your fuel drain when the van gets there - Three queries. What was put in, how much, and whether it's run. Those replies shape the job, which is why the quote comes after them but not before. - Draining it is how the mixture gets taken out of the tank. - The fuel lines are purged. If it ran, the petrol has moved beyond your tank, and the lines are carrying it. - Then the fuel filter: changed where there's a usable one, cleared where there is not. - The fuel system is primed with clean diesel. - The start-up. With fresh diesel in and your system bled, it is fired up and tested to confirm it runs smoothly. Till it runs on clean diesel, our technicians stay with it. It is very uncommon for a car caught soon to be left with permanent damage, and normal driving resumes right away. ## Back on the road around Upper Shirley after the fuel drain - Drive normally. There's nothing unusual to do once it's been started on clean fuel. - The first miles are the test. A dash warning, exhaust smoke, a rough idle or a flat throttle is your signal to stop then call us again. - The work may matter later with a hire firm, an insurer or a fleet manager. Hold on to your paperwork. - Next time, read the pump. The label, not the colour of the handle. ## About Upper Shirley Upper Shirley is a suburban area in southern Greater London, situated approximately 10 miles from central London. Upper Shirley has a relatively low elevation of around 110 metres and is characterised by detached housing. Upper Shirley is located near other suburban areas such as Shirley and Spring Park, and is close to the nearby town of Addington. Upper Shirley remains a residential community on the outskirts of London. ## Fuel drains round Upper Shirley and beyond Shirley, Spring Park and Addington are served by the same vans that take petrol in diesel call-outs in Upper Shirley — and so is most of Greater London beyond. Somewhere tricky to explain, or close to a boundary? Asking beats assuming — ring. ## Petrol in a diesel in Greater London? Leave it off and ring Step one is all of it: engine off, keys out, receipt in your pocket. From there Petrol in Diesel carries on, at the forecourt, by the roadside or on your drive.