--- title: Next Steps: Petrol in a Diesel Car Cotham canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/cotham-bristol/ location: Cotham county: Bristol latitude: 51.464470 longitude: -2.596410 service: Petrol in a Diesel Car updated: 2026-10-14 --- # Petrol in a Diesel Car in Cotham: What Happens Now Whatever you do, never switch your motor on, even for a moment, to move the vehicle. Pause; leave the car off. Petrol in a diesel that has not been run is generally a drain plus a flush, done right where your car stands, and what happens in the next few minutes determines that far more than anything else. Here's the sequence of things from now, anywhere you're in Cotham. ## Engine off: minute one with petrol in a diesel In this sequence, all before everything else: - Pull the keys out. Even the ignition on its own can prime your fuel system, pulling petrol out of the tank to exactly the parts it damages, so keep it off completely. - A bigger tank of the same mix is all adding diesel leaves you, because it removes nothing. So no more diesel. - Hazard lights on. If you're at all near moving traffic, make the vehicle easy to see before you do anything else. - Off the pump by hand. At a forecourt, ask the staff to help you push the vehicle away from the petrol pump. Do not fire it up to shift it, however short the distance. - Keep the till receipt. It says which fuel was put in and roughly how much, which is the first thing we will ask. On the M32, under a mile from Cotham, the next junction is the place to leave the car; anywhere, the first sensible location to stop. Do not press on to the services. Then go back to step one. ## Has it run yet? The fork in each Cotham fuel drain One answer is what everything after this stage depends on. Engine not run at all? - Nowhere but the tank: that's where that petrol yet is. - Where the vehicle 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 it's been started, even for a moment: - Petrol has been drawn out of your tank, past the filter and into the fuel lines. - On a bigger run it has reached the high-pressure fuel pump as well as the fuel injectors. - The job expands with the distance — lines rinsed, filter dealt with, sometimes more. Diesel keeps the high-pressure fuel pump and the fuel injectors lubricated as it goes through them. Petrol offers them nothing, and that's why the line is drawn there. Nothing is harmed by petrol that's only resting in a tank. Petrol being pumped is wearing the parts that shift the vehicle. ## What to have ready when you call about petrol in a diesel from Cotham A little planning is the difference between a technician that finds you and a van that goes round. - BS6 6 plus the rest of the postcode is the best way to begin telling us where you are. - A road name is a help: Cotham Side, say, or whichever street you have stopped in. A car park works too. - Car parks are found more easily by what they serve: say the one at Only Green, and it's simple. - Make and model of your vehicle, and the fact it is a diesel. - Say which got in — petrol or AdBlue — because AdBlue is a separate job, with a page of its own for Cotham. - The amount: your receipt's litres, or otherwise how long you had the nozzle in. - Has it run? If so, tell us how far it got, and the way it was driven. - Whose vehicle it is. Some hire or company agreements want the owner to approve this work, and that's easier settled before we get there than after. Next, 0333 366 0103. Not time-critical, the vehicle left at home with nowhere to be? Then works as well. ## The wait for a Cotham fuel drain, and what to do in it Stick to these: kindly meant help causes the damage during the wait. - Your safety comes before your car. Somewhere unsafe? Get clear of the traffic then wait away from it. Fine where it stands? Stay with it. - A kind passer-by doesn't fire it up. Nor does anybody wanting to check it still works, or rolling it a couple of yards. - Something from the boot, oil made for two-strokes or injector cleaner: no additive removes the petrol. - Clearing it yourself is out: a can of siphoned petrol on a verge is a danger, and your fuel beyond that tank stays where it is all the same. - Not for the radio, not for your windows: the ignition stays off. ## When our van gets there: your fuel drain, step by step - Three questions. What was put in, how much, and if it's run. The answers shape this job, which is why the price comes after them but not before. - Out of the tank comes the tainted mixture: your tank is emptied. - The lines are cleaned. If it ran, that petrol has shifted beyond the tank, and the fuel lines are carrying it. - Cleaned, or replaced if your car has a usable one: the filter is dealt with next. - Clean diesel in, and the system primed. - First start on clean diesel. When priming is done, the motor is fired up and our technicians confirm that it runs smoothly. Only once it's running on clean diesel do our engineers go. If it has been caught quickly, lasting damage is very rare, and the vehicle returns to normal driving straight away. ## Back on the road in Cotham after your fuel drain - Started on fresh diesel, it needs nothing unusual of you. Just drive normally. - The first miles are the test. A warning lamp, exhaust smoke, a rough idle or a flat throttle is your signal to stop then call us a second time. - Hold on to the documents. A hire firm, a fleet manager or an insurer may ask what was done. - The handle's colour is not the thing to go by next time — the label on the pump is. ## About Cotham Cotham is a suburban area in Bristol, situated approximately 0.8 miles from the city centre, with a mix of old and new buildings, including a high proportion of flats. Cotham sits at an elevation of around 66 metres, in a location that is relatively flat compared to some other areas of Bristol. Cotham is close to nearby places such as Kingsdown, Tyndalls Park, and Redland, and is home to a population of around 17008 people. Cotham is also within easy reach of the wider South West region, being around 106.2 miles from London. ## Cotham and nearby: fuel drains across the area Most of Bristol has the same teams as Cotham for petrol in diesel calls, Kingsdown, Tyndalls Park and Redland included. Somewhere tricky to describe, or close to a border? Asking is better than guessing — ring. ## Ring, and leave the vehicle off — petrol in a diesel around Bristol Engine off. Keys out. Receipt in your pocket. That is the whole of step one, and Petrol in Diesel takes it from there — at the kerbside, at the forecourt or on your driveway.