--- title: Next Steps: Petrol in a Diesel Car Old Portsmouth canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/old-portsmouth-hampshire/ location: Old Portsmouth county: Hampshire latitude: 50.789790 longitude: -1.102870 service: Petrol in a Diesel Car updated: 2026-10-26 --- # The Next Steps, in Order: Petrol in a Diesel Car in Old Portsmouth Whatever you do, never switch the motor on, even briefly, to shift the vehicle. Stop; leave the car off. Hasn't been run? Then petrol in a diesel tends to be a simple drain-and-flush job wherever the car has stopped — and nothing settles that as much as these next few minutes do. Below is the order from this point, anywhere around Old Portsmouth you are. ## Petrol in a diesel? What to do in minute one Go through these in order, before you do anything else. - Pull your keys out. Even your ignition on its own can prime the system, pulling petrol out of your tank to exactly the parts it damages, and so keep it off wholly. - Don't top it up with diesel. Adding diesel takes out nothing. You end up with a fuller tank of the same mix. - Near moving traffic? Then the hazards come on before everything else, so the vehicle is simple to see. - The attendants will normally help you roll it away from the petrol pump. Let them, and roll it by hand — not on the engine, even for a few yards. - Which fuel, and about how much? The receipt answers both, and that's where our questions start. Never bin it. If you were still on the move when you realised, stop somewhere safe rather than pushing on for the services — on the M275, under 3 miles from Old Portsmouth, that means the next junction. Step one comes next. ## Has it run yet? The fork in each Old Portsmouth fuel drain One answer is what everything after this point depends on. Not run, not even once: - All the petrol remains in that tank, and only there. - Where your car sits is normally where the work happens: a drain, then a flush. - This is the best position to be in, and the whole reason step one counts. Run at all, however briefly: - The lines and the filter already carry petrol drawn from your tank. - On a longer run it has reached the high-pressure fuel pump as well as the fuel injectors. - The farther it went, the bigger the job — the lines, the fuel filter, and now and then more besides. Petrol doesn't lubricate. Diesel does, oiling your pump and injectors as it flows through, which is why the line falls where it does. In that tank, sitting still, petrol does no harm. The components that move it are grinding the moment petrol is being pumped. ## Calling about petrol in a diesel from Old Portsmouth: what to have prepared Whether the technician goes round or finds you depends on a little planning. - Where you are. A postcode beginning PO1 2 is the ideal start. - Give the street — Farthing Lane or wherever you have stopped — or the car park. - Or the nearest landmark. A car park is easier to find by what it serves, like the one at Co-op Food. - Make and model of your vehicle, and the fact it is a diesel. - Tell us which went in — petrol or AdBlue — because AdBlue is a different job, with a page of its own for Old Portsmouth. - The quantity: your receipt's litres, or otherwise how long you had the nozzle in. - Has it run? If so, tell us how far it went, and how it was driven. - Settle who has the vehicle before our engineers arrive: some hire and company contracts want the owner to approve the work, and doing it faster first. Then call 0333 366 0103. If it can wait — your car is at home and going nowhere — works too. ## While you wait for a fuel drain around Old Portsmouth Help, however well meant, is the thing that does the harm while you wait. So stick to these. - Where your car has stopped decides where you wait. Somewhere exposed: away from it, away from the traffic. Sensible: with it. Either way, safety before your car. - A kind passer-by does not start it. Nor does anybody wanting to check it still does the trick, or moving it a couple of yards. - None of it takes that petrol back out — not two-stroke oil, not injector cleaner, not anything from your boot. So no additives. - A DIY drain misses your fuel that has already gone beyond your tank, and siphoning petrol by the road is hazardous besides. - Ignition stays off. Even for your radio or the windows. ## Step by step: your fuel drain when our van gets there - First, three questions: which fuel got in, the volume, and has it run? Those replies decide this job, and so our price follows them. - Draining it's how the mixture gets taken out of the tank. - If it ran, your lines are carrying petrol that has moved beyond your tank — so they're purged. - Then your filter: swapped where there is a serviceable one, cleared where there is not. - Clean diesel goes in, then the system is primed. - Starting up. When the system is bled with new diesel, our technicians start the car and confirm it runs properly. We wait until it's running on fresh diesel. Permanent damage is very unusual if it has been spotted quickly, so the car can go right back to normal use. ## After your fuel drain: back on the road around Old Portsmouth - After it has been started on fresh fuel, there's nothing special to do: drive normally. - Give the first miles your attention. Smoke appearing, a warning light coming on, the idle going lumpy or the throttle hesitating: pull over then call us back. - Hold on to your documents. A hire firm, a fleet manager or an insurer may ask what was done. - Check the label on the petrol pump next time, not the colour of its handle. ## About Old Portsmouth Old Portsmouth is a suburban area located on the coast of Hampshire, sitting at an elevation of around 5 metres above sea level. Old Portsmouth is situated close to the city of Portsmouth, with which it is closely associated, and is near other areas such as Portsea and Somers Town. Old Portsmouth is characterized by its predominantly flat housing stock, which reflects its urban setting. Old Portsmouth is also relatively close to London, being around 65 miles to the south-west of the capital. ## Fuel drains around Old Portsmouth and the locations nearby The same vans that answer petrol in diesel jobs around Old Portsmouth cover Portsea, Portsmouth and Somers Town, and most of Hampshire beyond them. Ring and ask instead of assuming if you are somewhere hard to describe or close to a boundary. ## Leave it off and ring: petrol in a diesel around Hampshire Stage one is the whole of it: engine off, keys out, receipt in your pocket. From there Petrol in Diesel carries on, on the forecourt, by the kerbside or on your drive.