--- title: What Now? Petrol in a Diesel Car Knowle canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/knowle-bristol/ location: Knowle county: Bristol latitude: 51.438160 longitude: -2.575230 service: Petrol in a Diesel Car updated: 2026-10-18 --- # Knowle: Petrol in a Diesel Car? Here Is What Happens Pause, and leave the motor off — not on, and not for a moment to move the vehicle. The next few minutes settle it far more than anything else: petrol in a diesel still unrun generally comes down to clearing and cleaning, right there. Wherever you happen to be around Knowle, this is the order things run from here. ## Engine off: minute one with petrol in a diesel Go through these in order, first. - The ignition off, keys out. Switched on, the ignition can prime the system — and priming is what draws petrol out of the tank into the parts it harms. - Don't top it up with diesel. Adding diesel removes nothing. You are left with a bigger tank of the same mixture. - Make the vehicle easy to see before anything else — hazard lights on — if there's moving traffic anywhere close to you. - The attendants will generally help you push it away from the pump. Let them, then roll it by hand — not on the motor, even for a few yards. - Hold on to the till receipt. It says which fuel went in plus about how much, which is the first thing we will ask. Still driving when you realised? Come off the M32 at the next junction if that is where you are, under 3 miles from Knowle, and stop somewhere safe and not pushing on to the services. Then start at step one. ## Knowle fuel drain: has your engine run yet, or not? From this stage on, everything hinges on a single answer. If your engine has not run at all: - Nowhere but that tank: that's where that petrol yet is. - Draining and flushing, on the spot, is normally the whole job. - Being here is the best case — which is the whole point of stage one. If your engine has been run, even briefly: - From your tank, through your filter, into your lines: that is how far the petrol has travelled. - The high-pressure pump and your injectors get it on a longer run. - The job expands with the distance — lines flushed, filter sorted, occasionally more. The line falls there because diesel protects the high-pressure fuel pump and the fuel injectors on its way through them — and petrol doesn't. In the tank, sitting still, petrol does no harm. Petrol being pumped is wearing the parts that move it. ## Calling about petrol in a diesel from Knowle: what to have ready Whether the van goes round or finds you depends on a little planning. - The ideal place to start is a postcode — one starting BS4 2 — for where you have stopped. - Wherever you have parked, the road's name helps — whether that's Bayham Road or somewhere else — and so does the name of a car park. - What a car park serves is the easiest way to find it, so mention the landmark — such as the one outside Paprika Store. - The car. Make, model, plus that it is a diesel. - What went in. Petrol, or AdBlue. AdBlue is a separate job with its own page for Knowle, and so tell us which. - About how much — in litres from your receipt, or by how long the nozzle was in. - Whether it has run. Then if it has, how far plus how heavily. - Hire or company car? Some agreements want the owner's go-ahead for the work, and getting it before we turn up is quicker than afterwards. Ring 0333 366 0103 once you've got that together — or, if the vehicle is at home, going nowhere, use . ## Knowle fuel drain on its way? Whilst you wait During the wait, the damage comes from kindly meant help — which is why these count. - Your safety comes before your car. Somewhere dangerous? Get away from the traffic then wait away from it. Safe where it is? Stay with it. - Not to roll it a few yards, not to check it is all right, not for a passer-by's kindness: no one starts it. - Something from the boot, oil made for two-strokes or injector cleaner: no additive lifts the petrol. - Draining it yourself is out: a can of siphoned petrol on a verge is a danger, and your fuel beyond that tank stays put regardless. - Keep the ignition off — the windows and the radio too. ## Step by step: your fuel drain when the van gets there - Three queries. What went in, how much, and whether it has run. Those replies decide this job, which is why our quote comes after them but not before. - Next the tank is cleared, so the contaminated fuel comes out. - Flushing your lines comes next, since a car that ran has petrol past the tank, in the fuel lines themselves. - Your filter is seen to. Cleared, or swapped where the car has a workable one. - The fuel system is primed with fresh diesel. - The start-up. With new diesel in and the fuel system primed, it's started and checked to make sure it runs correctly. The car has fresh diesel running through it before our engineers leave. The car returns to normal driving straight away, and lasting damage is very uncommon when it has been noticed early. ## Once the fuel drain is done: driving around Knowle again - Started on fresh diesel, it asks nothing unusual of you. Simply drive normally. - Give the first miles your attention. Smoke showing, a warning light coming on, your idle going lumpy or the throttle stumbling: pull over and ring us back. - An insurer, a fleet manager or a hire company may ask what was done, and so keep your paperwork. - The handle's colour is not the guide to go by next time — the label on the petrol pump is. ## About Knowle and where it is Knowle is a suburban area in Bristol, situated on the banks of the River Avon at an elevation of around 58 metres. Knowle is characterized by its predominantly terraced housing stock and is located approximately 1.5 miles from the city centre of Bristol. Knowle is close to nearby places such as Totterdown, Windmill Hill, and Knowle Park, and is home to a population of around 11842 people. Knowle is also within easy reach of the wider South West region, being around 105.4 miles from London. ## Fuel drains in Knowle and the places nearby Most of Bristol gets the same vans as Knowle for petrol in diesel calls, Totterdown, Windmill Hill and Knowle Park included. Assuming does not help near a boundary or somewhere hard to explain; a quick ring and a query does. ## Ring, and leave the car off — petrol in a diesel around Bristol Petrol in Diesel takes it from there — on your driveway, at the kerbside, at the forecourt — once you've done step one: keys out, engine off, receipt in your pocket.