--- title: Drain Petrol From a Diesel Car — Colt Hill canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/colt-hill-hampshire/ location: Colt Hill county: Hampshire latitude: 51.257810 longitude: -0.933760 service: Petrol in a Diesel Car updated: 2026-10-13 --- # Petrol in a Diesel Car in Colt Hill With that tank still carrying the fuel and the motor not yet turned over, nearly every job requires only a drain, so leave the motor off. That result is decided in the minutes straight after filling up, and not by the amount that got in. All over Colt Hill and the rest of Hampshire, Petrol in Diesel drains the vehicle and flushes it where it is, whether at a roadside, on a driveway or at a forecourt. Contact us before everything else begins, so you will learn what comes next. ## The first five steps: petrol in a diesel - Do not start it. Fired up regardless? Then never rely on it. Diesel in a petrol vehicle generally won't run, so the motorist stops and the wear halts with them. Petrol in a diesel? It starts. It idles. It pulls away fine, for a couple of miles. Motorists get that reversed. It's not fine — the fuel system is grinding every mile you drive. - Two things, diesel: it combusts, and on the way through it keeps the high-pressure pump and injectors greased. Petrol only does the one. Which is why your ignition remains off also — turn it on and you often prime that system, and that's petrol exiting the tank for exactly those components. - Never thin it. Diesel poured on top takes out nothing, and so all you get is more of what was already there, because percentage isn't how a diesel fuel system tolerates petrol. Super unleaded? Simply petrol. The grade makes no difference. - Stay where you are if you reasonably can. A vehicle that has not moved is the easiest one to handle, and we'd rather get to an odd spot than have it started. If you are pulled up on the verge on Linden Avenue, switch your hazards on and leave the car there. - Get your position prepared before you ring. A postcode that starts RG29 1 and whatever is nearest to you with a label on it is the difference between a van showing up and a van circling. - What got in, approximately how much, plus whether the engine has started — these three answers settle the full visit. Call 0333 366 0103 then tell us. The journey back would roughly double it, for no purpose at all. One commute has already put a real quantity of petrol-thinned diesel through your high-pressure pump of your Renault Megane. So keep it where it stands. Ring us from the platform if that is easier — nobody needs you hovering over your car at Hook whilst our engineers get on, and tonight trumps finding out on Monday. ## On a forecourt: removing petrol from the diesel The job kicks off at the pump, mostly. Often enough the job wraps up on site too. The drain generally gets done right there. Still on the forecourt at Texaco? Given the owner's consent, that's a spot our technicians work, and routinely. A filling station is the single location it is caught before the engine has fired. Our engineers can still deal with it where it stands, even away from the forecourt. In a car park, on a drive or in a lay-by, your car has been switched on and driven there, and that sucked fuel through your filter then into the high-pressure pump, all the way from the tank. None of that is a catastrophe, though the flush then has to reach past the tank to the lines and the filter, and the few seconds between reading the receipt and going for the keys are what determine that. Attendants will generally pitch in pushing it clear of the pump, which lets the next customer get by. Accept the offer. Firing the car over four vehicle lengths? Not a chance. If you've put petrol in the diesel Volkswagen Passat in Colt Hill and you're now sat outside The Co-operative Food with a boot loaded with shopping, ring us. Do not fire it up a second time to leave that spot. We'll come out to you, empty the tank, purge the fuel lines then put new diesel in so you can drive home. A mile or so at gentle throttle draws little diesel, so these are often the simple cases. ## Colt Hill plus the areas next to it Colt Hill is a small village, and so our team get out to it and to the areas around it on the same trips: Odiham, Broad Oak, North Warnborough, Warnborough Green and Potbridge. If yours isn't on the list it doesn't mean we don't come — there are pages for the majority of places around Hampshire, and the ones mentioned above are just the immediate neighbours. Call us to ask rather than presuming, above all if you are on the boundary or somewhere a satnav struggles with. The patch the page includes appears on the map. Our technicians work at the roadside, on forecourts, on driveways and in car parks throughout all of it, and the car doesn't need to move to us. How far, and how hard? The second of those counts more than the first, so have both ready. The Skoda Octavia will have felt perfectly normal on the way back from Mayhill Junior School — they all do, and that is the catch. Diesel into a petrol motor usually will not run at all: the motorist stops, and so does the harm. Petrol into a diesel starts, idles, pulls away like nothing happened, while the high-pressure fuel pump gets on with its work minus the lubrication the fuel should be giving it. No warning appears, because behind the wheel nothing looks wrong. ## Stuck on the kerbside somewhere in Colt Hill? Not everyone has a chance to pull in anywhere sensible. Set off, then realised? Landed along the verge beside London Road, or sat in some lay-by with the hazards flashing? That's a routine call here. Not a rare one. Whether you remain beside your car or keep clear of it turns on if sitting there seems wise. It will often oblige. A diesel running on petrol limps along very willingly, and that is the trouble: start it up to get to somewhere handier and the mix goes further into your fuel system with every mile driven. Carrying on causes the car far more harm than our van heading out to a difficult spot, and that's no trouble for us. The parts that should be getting oiled are grinding instead, and the car gives no sign of it: a diesel on a diluted tank fires up and pulls away perfectly well. Try the journey home from The Waterwitch? Don't. Call us then leave the Audi A4 where it stands. ## Petrol in a diesel, and the car has moved The M3 is the road that counts now, and it sits under 3 miles from Colt Hill. Lost power, an uneven idle, some smoke: those are the symptoms when they appear, rather than a tidy stop — and a wrongly fuelled diesel will often get you onto it and some distance along before anything feels wrong at all. Get off at the first safe junction, switch off, and don't restart the vehicle to move it. Long run? Anything near the under 25 miles to the closest city and you should presume the lot — filter, pump, injectors, all of that reached by the contamination. Say that on the call, since it affects what goes in the van. ## A little about Colt Hill Colt Hill is a locality situated on the riverside in Hampshire, with an elevation of 84 metres. Colt Hill lies near the towns of Odiham and Winchester, and is also close to the villages of Broad Oak and North Warnborough. Colt Hill is characterized by its predominantly detached housing stock, and is home to a population of around 903 residents. Colt Hill is located 38.8 miles from London, making it a potential commuter base. ## What happens when our technicians get to you in Colt Hill - Three things get established before any price — your fuel that got in, the amount, and whether anything has been run since. Each answer shapes the work. - Our technicians clear your tank of all the polluted fuel. - Lines purged, filter cleared. Whatever remains later on is not the thing that started the trouble. - Our engineers put new diesel in and bleed the system. - Your engine is fired up and checked to confirm it runs correctly on new diesel. From that point, you are ready to drive away. Long-term damage is very unusual when it has been caught early, and because everything is done where the vehicle is, it never needs to be taken to a garage. Off the forecourt, receipt read, a few hundred yards, parked near Stocks. For a diesel Peugeot 3008 whose engine has turned, that is about the best version there is. Phone us, then let it stand with your ignition alone. Short assists, really — but a start is a start and a drive is a drive, and the fuel filter has had weakened fuel through it, and so has your pump. Which is why your lines get flushed and not just the tank cleared. ## AdBlue in your diesel tank instead, in Colt Hill? The problem isn't the same, though the opening instruction is — don't start it — if what got in was AdBlue instead of petrol. The lubrication a fuel system relies on gets taken away by petrol, which thins the diesel. AdBlue is urea in water, and in a diesel tank it leads to rust and deposits in its place. Both are ours. There's a separate Colt Hill page for AdBlue removal, with the details on it — including the reasons it often turns out to be the worse of the two. ## How much is a petrol-in-diesel fuel drain around Colt Hill? We cannot put one figure on this page truthfully, because the job isn't one job. What changes it: - This is the main one: whether the engine has been run, or driven. - The tank's capacity, set against how much of the wrong fuel got into it. - The kind of liquid in the tank, petrol or AdBlue. - Whether a technician can safely get to the vehicle and work on it, which depends on where your car is. The vehicle, the amount, whether it has run — give us those and the answer comes back firm and not as a range. Not pressing, with your car at home and going nowhere? Then does the job. ## Petrol in diesel questions from Colt Hill drivers ## Can you do a fuel drain at a petrol station in Colt Hill? Much of what our technicians do takes place nowhere else. So yes. Our engineers attend Esso and the other forecourts around town routinely, with the site's permission — tell us which one you are at when you phone and we'll tell you if our technicians can work there. ## A few litres of petrol in a diesel — too much? Ratio settles it rather than litres — and more than either, whether the engine has run. Five litres in a nearly empty tank is a distinct case from five in a full one — but either way, the thing that settles how much work is required is whether that mix has been pulled through the fuel system. ## I put petrol in my diesel and drove the car. What next? Pull over somewhere safe, turn off, and leave the vehicle off. Not restarting it is the single most helpful thing available to you now. Driving does shift the issue out of the tank and into the pump and injectors, yes, and it stays salvageable much more frequently than drivers expect. ## Will a fuel drain void my warranty? A drain and flush carried out properly is not a modification and doesn't cancel a manufacturer's warranty. What is likelier to start an argument is a diesel that has been run on petrol. One more good reason for the motor to stay off. ## Two-stroke oil in the tank, and then home? No. It belongs to a separate problem from a bygone era, and petrol has diluted something no oil of that kind restores. Later on? Still petrol in that tank, and a pump that has to put up with the stuff. ## Do I need a main dealer for petrol in a diesel? You do not need one. The vehicle is drained and cleaned wherever it is, with no need to bring it to a franchised dealer. ## Standing next to it? Keep the car switched off. If you have already driven the vehicle, pull over somewhere safe, switch it off then leave it off. A still, cold vehicle is the best position to be in, and this is recoverable from a lot more commonly than drivers assume. Call-out fuel draining in Colt Hill and throughout Hampshire — at the roadside, on the forecourt or at home.