--- title: Petrol in a Diesel Car in Hartswell? — Fuel Drain canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/hartswell-somerset/ location: Hartswell county: Somerset latitude: 51.039550 longitude: -3.306450 service: Petrol in a Diesel Car updated: 2026-10-14 --- # Petrol in a Diesel Car in Hartswell With that tank still holding the petrol and your engine not yet started, almost every job takes only a drain, so keep your engine off. That result is decided in the minutes straight after filling up, and not by the amount that went in. All over Hartswell and the remainder of Somerset, Petrol in Diesel drains the car and flushes it where it sits, whether by a roadside, on a driveway or at a forecourt. Phone before everything else starts, so you'll hear what follows from there. ## Petrol in a diesel: what to try now - Never start it — and never trust it when it fires up. Here is the part people have wrong about petrol in a diesel in particular. A petrol motor given diesel typically just won't run, and so the person stops and the damage halts with them. A diesel given petrol usually starts, idles and pulls away quite happily for several miles. It is not okay. It's wearing that fuel system whenever you drive. - Leave the ignition alone also. Diesel performs two tasks: it burns, and before it combusts it protects your high-pressure fuel pump and its injectors. Petrol handles the first but not the second. Switching the ignition on is usually all it takes to prime the system, which carries the petrol out of your tank then into just those components. - Topping up removes nothing. It gives you a fuller tank of the same mix, because a diesel fuel system won't cope with petrol by percentage in the way that advice presumes — so don't pour diesel on top to dilute it. Octane is beside the point too: super unleaded is petrol. - We would much rather get to an awkward spot than have it started — so if you safely can, stay put. Nothing is quicker to deal with than a car that has never shifted. On the verge on Mill Lane, that means hazards on then keep the car. - A van turning up rather than circling turns on two things: a postcode starting TA4 2, and whatever is next to you with a name on it. Get both prepared before you dial. - What got in, roughly how much, and if the engine has run — these three facts decide your whole call-out. Ring 0333 366 0103 then tell us. ## At a forecourt: clearing petrol from a diesel A fair share of this job ends up done at the pump, because that is where it usually begins. The drain normally happens there and then. Still on the forecourt at the nearest petrol station? Given the site's agreement, that's a spot our technicians work, and routinely. A forecourt is the one setting it can be spotted before your motor has started. Our technicians can still sort it out where it is, even away from the pumps. In a car park, on a driveway or in a lay-by, the car has been switched on and moved there, and that sucked fuel through the filter then into your high-pressure pump, all the way from the tank. None of that is a calamity, although the flush then has to reach past the tank to the fuel lines and your filter, and the few seconds between reading the receipt and going for the keys are what decide that. Staff will generally chip in pushing it clear of the pump, which lets the next driver get by. Accept the assistance. Cranking it just to move four vehicle lengths is not. We will head your way, drain your tank, flush the fuel lines and put clean diesel in so you can drive home. So if petrol went into your diesel Volkswagen Tiguan in Hartswell and you're sat outside Co-op Food with a boot loaded with shopping, phone us — and do not start it again to get out of the bay. A mile or so at gentle throttle uses little of it, so such jobs are usually the simple ones. ## Areas our team serve in Hartswell The same journeys get us to Wiveliscombe, Ford, Langley, Croford and Screedy along with Hartswell, which is a small village. There are pages for nearly all locations around Somerset, and the ones listed above are just the nearest neighbours — so yours being missing from this list means nothing about whether we come. Phone and enquire instead of guessing — county lines especially, and wherever your phone tends to struggle with. The map marks the area this page includes. Roadside, forecourt, driveway, car park: the lot is ground our technicians serve, and none of that needs your vehicle to come to us. Every restart primes the fuel lines and drags more petrol past the filter then into your pump. So a wrongly fuelled diesel BMW 3 Series on the zig-zags outside Wiveliscombe Primary School is a nuisance, whereas the same car started three more times to be helpful is a fuel system instead of a tank. Somebody will urge you to move the car out of the gateway and sort it out later. Please don't. Leave it, let them grumble, and phone us. ## Stranded by the kerbside in Hartswell Not everybody has a safe spot to pull in. If you worked it out after setting off and ended up along the verge beside Station Road, or in a lay-by somewhere with the hazards going, that's a common call for us rather than a rare one. Stay by the car if it is wise to wait there, yet clear of the vehicle if it isn't. Every mile a diesel obliges you for on petrol drags the mixture further into the system — and oblige it often will, which is why your motor does not get restarted to limp somewhere handier. We'll bring the van to a tricky location without any fuss, and for the vehicle that is far better than driving on. A diesel Peugeot 3008 parked in the parking area by The Bear Inn carrying a tank of petrol in it is an easy job, right up until somebody drives it home. Park the car overnight then ring us in the morning. Nothing deteriorates whilst it sits. What we will want to know is whether that run there was brief and cold, as that is where petrol is least able to burn fully — and whatever doesn't burn can work past the rings and into the oil. ## So you've run it? Petrol in a diesel over a couple of miles This is where your M5 comes into it — under 10 miles from Hartswell. A loss of power, a lumpy idle, some smoke: those are the signs when they come, rather than a tidy stop — and a misfuelled diesel will usually get you onto it and some distance along before anything seems wrong at all. Pull off at the next sensible junction, turn off, and do not restart it to reposition. Long drive? Anything close to the under 25 miles to the nearest city and you should presume the lot — filter, pump, injectors, all of it arrived at by the contamination. Say that on the call, since it affects what goes in our van. A diesel injection system works hydraulically as well as chemically: the fuel has to hold pressure, not merely burn. Thin that fuel and pressure which should build and stay built escapes past clearances instead, leaving your engine a weaker, later, less even delivery than it was designed around. Petrol weakens diesel, and diesel has to be viscous enough to seal the precision parts it runs through — that is the entire process. It accounts for the normal Longlands Copse call too: a diesel Mercedes E-Class that went out without a murmur and came back down on power, lumpy at idle, perhaps smoking a little. None of which is the engine failing, and that's the part worth hearing. Your fuel has stopped behaving like diesel. Put the fuel right and it stops. ## All about Hartswell Hartswell is a small locality in inland Somerset, situated near the towns of Wiveliscombe and Langley, and approximately 24 miles from Exeter. Hartswell sits at an elevation of around 102 metres, with a mix of rural and residential areas, including a predominance of detached housing. Hartswell is part of a wider network of small settlements in the region, with nearby Ford and other villages contributing to the local community. Hartswell has a population of around 1006 people, according to recent estimates. ## What our technicians do when our technicians reach you around Hartswell - The answers shape the work, which is why our engineers ask before giving a price: what went in, how much of that, and if your motor has run. - Out goes the polluted fuel. - Fuel lines are rinsed through and the fuel filter cleared, leaving nothing in the system that caused any of this. - Priming follows, once new diesel is in. - Our technicians fire it up and confirm it runs properly on fresh diesel. From that point, you're ready to drive away. Lasting damage is very uncommon when it has been spotted soon, and since everything is done where the car is, it never has to be taken to a garage. ## Hartswell AdBlue removal is a separate job Do not fire it up: that opening rule holds whether what was put in was AdBlue or petrol. What changes is this fault itself. Petrol weakens the diesel and removes the lubrication your fuel system depends on. AdBlue is urea dissolved in water, and in a diesel tank it brings rust and deposits instead. Often the more significant of the two, AdBlue — and the full story lives on its own Hartswell page. Both are ours to deal with. Hire car or company car? Call them before you call us — some contracts want the hire firm to authorise the work, and sorting that out first is a great deal faster than sorting it later on. Then phone us about the Kia Sportage near St. Andrew's Church, and do not worry that you can't say how full that tank was. Almost nobody can, in a car they collected two days ago, and our engineers work it out on the spot. The reason we ask is that petrol in a diesel does its damage as a share: the same few litres in an almost empty tank is a far stronger mix than in a full one. Petrol is rated on how well it resists igniting under pressure, which is the opposite of what a diesel needs — so the stronger the blend, the more it rattles, smokes and goes flat. ## How much is a petrol-in-diesel drain in Hartswell? Our technicians can't put one price on this page honestly, as the job is not one job. What shifts it: - This is the key one: whether the motor has been run, or driven. - The tank's capacity, set against how much of the wrong fuel went into it. - The type of liquid in the tank, petrol or AdBlue. - Whether a technician can safely get to your car and work on it, which hinges on where the vehicle is. A straight answer rather than a range is what you get for telling us three things: the vehicle, the amount, and if it has run. For your car at home that's going nowhere and is not pressing, is fine too. ## Hartswell motorists ask us these about petrol in diesel ## Can you do a fuel drain at a petrol station around Hartswell? Yes, and it's where a good part of this work takes place. Our engineers visit another forecourt nearby and the other forecourts nearby routinely, with the owner's consent — tell us which one you're at when you call and we'll tell you if our engineers can work there. ## How much petrol in a diesel is too much? Whether the motor has run counts far more, though the proportion counts too, rather than the litres. A nearly empty tank with five litres in it, against a full one with the same five: different scenarios, of course. Either way, the work required comes down to one thing, which is whether your fuel system has had that blend sucked through it. ## Petrol in my diesel, and I have driven the car Stop sensibly. Off. Nothing after that. Not restarting it is the single most useful thing available to you now. Driving does move the issue out of the tank then into your pump and injectors, yes, and it stays salvageable much more commonly than drivers expect. ## Is a fuel drain going to void my warranty? No. Carried out properly, emptying and purging is no change at all, and the warranty from your manufacturer is unaffected by it. Another reason to leave it switched off: running a diesel on petrol is the thing more likely to cause a disagreement with one. ## Adding two-stroke oil, then driving home No. It belongs to a different problem from a bygone era, and petrol has weakened something no oil of that kind puts back. Afterwards? Still petrol in your tank, and a pump that has to put up with the stuff. ## Do I need a main dealer for petrol in a diesel? There is no need to bring it to a main dealer, as our engineers drain and clean your car wherever it is. ## Waiting next to it? Don't turn the car on again. Already driven it? Then stop somewhere safe, switch off, then let it stay that way. A parked, cold car is the best place to be in, and this is recoverable from a lot more frequently than drivers fear. At the kerbside, on the forecourt or at home — call-out fuel draining around Hartswell and across Somerset.