--- title: Fuel Drain in Ilminster — Petrol in a Diesel Car canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/ilminster-somerset/ location: Ilminster county: Somerset latitude: 50.928310 longitude: -2.913960 service: Petrol in a Diesel Car updated: 2026-10-18 --- # Put Petrol in a Diesel Car in Ilminster? Don't Start It With the tank still carrying the petrol and the motor not yet started, nearly every job needs only a drain, so keep the engine off. That outcome is determined in the minutes immediately after filling up, rather than by the amount that was put in. Across Ilminster and the rest of Somerset, Petrol in Diesel drains the vehicle and cleans it where it is, whether at a roadside, on a driveway or at a forecourt. Phone and then our team will explain what comes next before you do any more. ## Now what? Petrol in a diesel, in order - Never fire it up. Turned on all the same? Then do not rely on it. Diesel in a petrol motor normally can't run, and so the motorist stops and the damage halts with them. Petrol in a diesel? It starts. It idles. It moves off normally, for several miles. People get that reversed. It isn't fine — the fuel system is grinding every mile you do. - Two jobs, diesel: it combusts, and on the way through it keeps your high-pressure pump and injectors greased. Petrol only manages the one. Which is why the car's ignition is left off also — turn it on and you often prime that system, and that's petrol exiting your tank for just those parts. - Don't put diesel on top to thin it. A diesel fuel system doesn't tolerate petrol by percentage the way that guidance presumes, and topping up clears nothing — it just gives you a bigger tank of the same blend. The type makes no difference either: super unleaded is simply petrol. - Stay still if it is sensible to. Hazards on, ignition off, leave it. Wherever you have stopped — the verge on High Street, anywhere — an odd location for us trumps a started motor, and nothing is quicker for us to sort than a car that never shifted. - Know where you are before ringing. A postcode that starts TA19 9, and the name of whatever is next to you. Otherwise our van circles rather than showing up. - Dial 0333 366 0103. Let us know what went in, roughly how much, and also if your car has run. Those three replies determine your whole call-out. Quarter past eight, a fast fill on the trip in, and you realise at about eleven — by that point the diesel Volkswagen Golf has been sitting at Crewkerne for three hours. Call us and keep it precisely where it stands. The drive in is the part that matters now, as diesel performs two tasks on its way through a motor: it burns, and before it burns it protects the injection pump and its injectors. Petrol handles the first and not the second. So those couple of miles were travelled with your pump running on a fuel that had shed a great deal of the protection it is built around — which is why the question we ask is how far you drove, not how long the car has been standing. ## Forecourt draining for petrol in a diesel A big chunk of the job is completed at the pump, because that's where it mostly kicks off. Still at Tesco? Then that is usually where it takes place. Petrol station forecourts are normal for us, with the permission of the owner. At the forecourt, this gets stopped with your engine never fired, and nowhere else manages it. Everywhere else — a car park, a driveway, a lay-by — your car was fired up and driven to get there, which means fuel was sucked from the tank, through your filter and into the high-pressure fuel pump. That's not a disaster, and our engineers can still put it right where it is. It does mean your lines and the filter need flushing as well as that tank, and that is determined by the few seconds between reading the till receipt and going for the key. Roll the vehicle out of the way if the staff offer, and they usually will. The next motorist gets by the petrol pump, and that's worth doing. Four car lengths isn't worth the risk. The call our technicians want sounds like this: diesel Renault Megane, a couple of litres of unleaded, done a couple of miles, now shut off outside Tesco. What we are actually asking is how much fuel the pump has drawn — not how long ago it was. ## Parts our team cover in Ilminster Being a riverside town, Ilminster sees a routine visit, and the villages nearby come along on that same trip: Winterhay Green and Townsend, Dowlish Ford and Ashwell, Knott Oak. If yours is not on the list it does not mean we do not come — there are pages for the majority of towns around Somerset, and the ones named above are just the nearest neighbours. Guessing is the mistake to resist, particularly on a border or somewhere a satnav fails. Phone and enquire. That map is the patch this page includes. Kerbside, forecourt, driveway, car park: all of that is ground our engineers serve, and none of that needs the car to travel to us. ## Ilminster: stranded where you stopped The chance to pull in somewhere sensible does not fall to everybody. If you noticed after setting off and ended up by the verge beside West Street, or in a lay-by somewhere with your hazards flashing, that is a routine call for us and not a rare one. Sit with the vehicle when it's safe to be inside, yet clear of the car if it's not. Every mile a diesel obliges you for on petrol draws that blend further into the fuel system — and oblige it frequently will, which is why the engine doesn't get restarted to limp somewhere handier. Our van coming to a tricky location is no trouble for us, and it's a lot better for your car than driving on. A diesel Mercedes C-Class parked in the car park at The Dolphin carrying a tank full of petrol in it is a simple job, right up till somebody drives it home. Leave the car overnight and phone us in the morning. Nothing deteriorates as it waits. What we will ask is if the drive there was brief and chilly, because that is where petrol is least likely to burn properly — and whatever won't burn can slip past the piston rings and into the oil. ## Driven it already? Pull over, and see below Here is where the M5 comes in, under 10 miles out of Ilminster. Some distance along, and onto it in the first place: a misfuelled diesel will frequently manage both before anything feels wrong. What you get then is rarely a tidy stop. Power ebbs away, your idle gets rough, and there may be smoke. The next safe exit is the one to take. Turn off there, then leave the restarting alone. On a longer drive — anything close to the under 25 miles to the closest city — take it the petrol has been through the fuel filter, your pump and the injectors, and say so when you ring. It affects what we bring. ## About Ilminster Ilminster is a small town in south Somerset, situated on the River Isle at an elevation of around 55 metres. Ilminster lies near several smaller settlements, including Winterhay Green and Dowlish Ford, and is connected to larger towns like Wells. Ilminster has a population of approximately 5961 people, predominantly living in semi-detached housing. Ilminster is located about 127 miles west of London, in the South West region of England. ## What happens when we reach you in Ilminster - Our engineers check what went in, how much, and if the motor has run. The responses shape the work, which is why our engineers ask before giving a price. - The polluted fuel is pulled from that tank. - Lines purged, filter cleaned. Whatever is left after that is not the thing that caused the problem. - Priming follows, once new diesel is in. - The engine is turned on and checked to make sure it runs smoothly on new diesel. That leaves the car ready to drive away. Our engineers do everything wherever your car has ended up, which means it never needs to go to a workshop, and if it has been spotted soon, it's very unusual for there to be permanent damage. Why so firm about leaving your keys alone? Because your pump is before the injectors, and a wearing one sends whatever it sheds on with the fuel. Call us. Leave the Ford Kuga close to The Warehouse Theatre. ## Ilminster AdBlue removal is a distinct problem If what went in was AdBlue instead of petrol, the first instruction is the same — never fire it up — but this fault is not. Petrol thins the diesel and strips the lubrication the system relies on. AdBlue? Urea dissolved in water. Put that in with your diesel and you get rust instead, plus build-up. AdBlue removal in Ilminster has a page of its own with the full story on it, including why it is often the more serious of the two. We deal with both. ## Paying for a petrol-in-diesel drain in Ilminster Frankly, no single number fits on a page like this. The job varies. Here is what varies it: - Has it been run or driven? Nothing else counts for as much. - The tank's capacity, set against how much of the wrong fuel went into it. - AdBlue or unleaded, whichever got in. - Access: the car's position, and whether working on it there's sensible for a van. Tell us what your vehicle is, how much went in, and whether your motor has run. A straight answer comes back, not a range. If it is not time-critical — the car is at home and going nowhere — is fine too. What takes place next is the trouble. The motor straight away draws the petrol still sitting in the fuel filter and the feed lines back round through the pump a second time, because emptying a tank does nothing about fuel that has already left it. Drain it then put new diesel in, someone confident will tell you — and that tip is half right, since do it to a diesel Kia Sportage parked up, Ilminster Parish Hall say, and the thing starts, which is what makes it sound reasonable. Ring us instead. Our engineers flush the system and take the fuel filter off where the vehicle has a serviceable one, and that is the difference between the car being fixed and the car merely starting. ## Questions our engineers get about petrol in diesel in Ilminster ## Fuel drains on a Ilminster petrol station forecourt Yes — forecourts are where a good portion of this takes place. Tell us which one you are at when you phone and we will tell you whether our engineers can work there. With the owner's permission our engineers visit Texaco and the other forecourts around town routinely. ## How much petrol in a diesel is too much? Whether your engine has run matters much more, though the proportion matters too, instead of the litres. Five litres in a nearly empty tank is a separate case from five in a full one — but either way, the thing that decides how much work is needed is if that mix has been sucked through your fuel system. ## Petrol in my diesel, and I have driven it Stop safely. Off. Nothing after that. Not restarting it is the single most useful thing available to you now. Driving does move the issue out of your tank and into your pump and injectors, yes, and it stays fixable a lot more regularly than drivers expect. ## Is a fuel drain going to void my warranty? A drain and flush carried out properly isn't a modification and doesn't void a manufacturer's warranty. Running a diesel on petrol is the thing more likely to cause a dispute with one, which is another reason to leave it switched off. ## Could I put some two-stroke in and just drive? Two-stroke oil solves a separate issue, and an old one at that. Nothing it does puts back what petrol diluted. No. Petrol stays in that tank later, whatever else goes in, and your pump gets no reprieve from it. ## Main dealers and petrol in a diesel Wherever your car is, our technicians drain and flush it there, so a trip to the main dealer does not come into it. ## Is the car still with you? Never switch the engine back on. If you have already driven the vehicle, pull over somewhere safe, switch it off and keep it off. Cold and still, a motor is in the best place available — and people fear this much more than the recovery rate warrants. Mobile fuel draining around Ilminster and across Somerset — at the kerbside, on the forecourt or at home.