--- title: Fuel Drain in Hailes Terrace — Petrol in a Diesel Car canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/hailes-terrace-east-lothian/ location: Hailes Terrace county: East Lothian latitude: 55.952310 longitude: -2.776110 service: Petrol in a Diesel Car updated: 2026-10-06 --- # Petrol in a Diesel Car in Hailes Terrace Petrol in Diesel drains and flushes wrong-fuelled vehicles where they are, on the forecourt, by the roadside or on a driveway, across Hailes Terrace and the remainder of East Lothian. The very first thing to do is not to fire up the engine. While the motor has not turned over and the petrol is still in the tank, a fuel drain is almost always all it needs, and the next few minutes decide that, not how much got in. One ring to us is plenty: our engineers can explain what happens from here. Do that first. ## Petrol in a diesel: what to try next - While you drive, the pump and your injectors wear down. That's why you never crank it, and why you never rely on it once it has started. The catch about petrol in a diesel in particular — the point drivers get wrong — is that it drives off normally for the first mile or two. Diesel in a petrol engine generally won't run at all, which stops the person and stops the wear with them. This one lets you drive on. - Two things, diesel: it burns, and on the way through it keeps the high-pressure pump and injectors oiled. Petrol only does the one. That is why the car's ignition stays off also — switch it on and you frequently prime your system, and that's petrol leaving that tank for precisely those parts. - Don't water down it. Diesel poured on top clears nothing, so all you have is more of what was already there, because percentage isn't how a diesel fuel system tolerates petrol. Super unleaded? Still petrol. The octane makes no difference. - Our team would much rather come to a difficult place than have it started — so if you sensibly can, sit tight. Nothing is easier to handle than a vehicle that has never moved. On the verge on Mill Wynd, that means hazards on and leave the car. - Get your location ready before you phone. A postcode starting EH41 4 and whatever is nearest to you with a sign on it is the difference between a van arriving and our van circling. - Ring 0333 366 0103. Tell us what went in, roughly how many litres, and also if your car has run. Those three replies shape the full job. Quarter past eight, a quick fill on the road in, and it dawns on you at about eleven — by that point the diesel Volkswagen Passat has been parked at Drem for three hours. Phone and keep it precisely where it stands. The journey in is the part that matters now, because diesel has two jobs on its way through the engine: it burns, and before it ignites it greases the high-pressure pump and those injectors. Petrol does the first and not the second. So those few miles were driven with the pump working on a liquid that had given up a lot of the protection it is designed around — which is why the question our engineers ask is how many miles you drove, not how long the vehicle has been standing. ## Forecourt drains for petrol in a diesel The job begins at the pump, typically. Quite often the job ends at one too. Still at JET? Then that's normally where it gets done. Station forecourts are everyday for us, with the agreement of the site. A forecourt is the only place it gets halted before your motor has fired. The few seconds between checking the receipt and going for your key settle how much requires cleaning. Anywhere other than a forecourt — a car park, a drive, a lay-by — your car was switched on and driven to get there, so fuel was drawn from your tank, through the fuel filter then into the high-pressure fuel pump. That means the lines and the filter require cleaning as well as your tank. It is not a catastrophe, and we can still deal with it where the vehicle stands. Clear of the petrol pump, the next driver can get past — so yes, let the attendants help you roll it. Very much worth doing. Starting the car to shift four car lengths is not. Our technicians will come out to you, drain that tank, flush the fuel lines then put new diesel in so you can head home. So if petrol went into the diesel Renault Clio around Hailes Terrace and you are sat outside Tesco with a boot full of shopping, phone — and don't crank it again to get out of the space. A mile or so at light throttle pulls hardly any fuel, which is why such jobs tend to be the simple jobs. ## Hailes Terrace and the areas beside it Being a small village, Hailes Terrace gets a routine visit, while its neighbours close by come with it on that same run: Haddington and Nungate, Dovecote and Black House Steading, Bolton. There are separate pages for the majority of places in East Lothian, and the ones mentioned above are merely the immediate neighbours — so yours being absent from the list says nothing at all about if our technicians come. Phone to check rather than assuming — county lines especially, and anywhere your satnav tends to misread. Use our map for the area shown on this page. Every bit of it is ground our engineers cover: a kerbside, a forecourt, a private drive, a car park. You don't drive your car anywhere. Shift it out of the gateway and fix it later — that's what somebody will say, and it's wrong. Stopped on the zig-zags at the local primary school, a misfuelled diesel Skoda Octavia is an inconvenience and nothing worse. Fired up three more times for courtesy, it's no longer a tank issue but a fuel system one, because priming takes place with every start and more petrol goes through the filter toward the pump. Let people moan. Phone us. ## Roadside breakdowns in Hailes Terrace The opportunity to pull over anywhere safe doesn't come to everybody. Set off, then realised? Ended up along the verge on Poldrate, or sat in some lay-by with the hazards going? That is a routine call here. Not an unusual one. Wait with the car if it's safe to be in it, yet clear of it when it isn't. It will frequently oblige. A diesel running on petrol limps along perfectly willingly, and that is the catch: fire it up to reach somewhere better and that mixture goes further into the system with every mile travelled. A van coming to a difficult location is no trouble for us, and it is much better for the car than driving on. A diesel Audi A4 sitting in the parking area outside The Tyneside Tavern holding a tank of petrol in it is a straightforward job, right up till somebody takes it home. Park the car overnight and phone in the morning. Nothing worsens whilst it stands. What our technicians will want to know is whether the drive there was short and cold, because that is where petrol is slowest to burn correctly — and what does not burn can work past the piston rings and into the engine oil. ## A couple of miles on petrol in a diesel: what next? Here is where your M8 comes in, under 25 miles out of Hailes Terrace. Some way along, and onto it in the first place: a wrongly fuelled diesel will frequently do both before anything feels wrong. What you get then is seldom a tidy stop. Power drains away, your idle goes uneven, and there may be some smoke. The next sensible junction is the one to take. Switch off there, and leave the restarting alone. On a longer drive — anything near the under 25 miles to the closest city — assume the mixture has been through your filter, your pump and your injectors, and mention it when you call. It affects what our engineers bring. Here's the entire mechanism. Diesel needs enough body to seal the close gaps it goes through, and petrol takes that away. That's it. Which explains the ordinary Neilson Park call — a diesel Peugeot 3008, out there without fuss and back down on power, rough at idle, perhaps a bit of smoke. Injection systems work hydraulically as well as chemically, and so your fuel has to hold pressure and not just burn; diluted, it leaks past those tolerances instead of building, and delivery comes weaker, later, less even than the motor was built around. Not a failing engine, though. Fuel that has stopped acting like diesel. Put that right and it stops. ## Where's Hailes Terrace? Hailes Terrace is a riverside locality in East Lothian, situated near the River Tyne and close to the town of Haddington. Hailes Terrace has a relatively low elevation of 47 metres and is located approximately 16 miles east of Edinburgh. Hailes Terrace is characterized by its predominantly flat-type housing and is part of the wider area that includes nearby Nungate and Dovecote. ## Our job around Hailes Terrace, step by step - We check what was put in, how much, and whether the motor has run. The responses change the work, which is why our technicians ask before quoting. - The polluted mixture is pulled out of that tank. - Lines flushed, filter cleared. Whatever is left later on isn't the thing that created the trouble. - Bleeding your system follows, once fresh diesel is in. - Our engineers turn it on and check it runs properly on fresh diesel. That has the car ready to pull away. There's no need to go to a garage at any stage, since the work is all done where your car is, and when it's spotted soon, lasting damage is very uncommon. ## Hailes Terrace AdBlue removal is a distinct matter AdBlue rather than petrol? Then the opening step is unchanged — your motor stays off — while the fault underneath it is a separate one altogether. Thinned diesel, and no protection left for the fuel system that depends on it. That's petrol. Corrosion and deposits are what a diesel tank ends up with instead, because AdBlue is urea dissolved in water. Both are ours. There is a separate Hailes Terrace page for AdBlue removal, with the detail on it — including the reasons it usually turns out to be the worse of the two. ## Budgeting for a petrol-in-diesel drain in Hailes Terrace Truthfully, no single number fits on a page like this. This job varies. Here is what moves it: - Started? Driven? Either answer counts more than anything else on this list. - How much of the wrong fuel got in, compared with how much that tank can hold. - Which went in: petrol or AdBlue. - Where is it? And can a technician reach it and work there safely? Tell us what the car is, how much got in, and if your engine has run. A firm answer comes back, not a range. If it isn't time-critical — your car is at home and going nowhere — is fine too. ## Questions our engineers get about petrol in diesel in Hailes Terrace ## I'm on a forecourt in Hailes Terrace. Can you drain the vehicle here? A fair part of this work gets done there, so yes. Tell us which one you are at when you call and we'll tell you if our engineers can work there. With the station's permission our technicians visit Shell and the other forecourts nearby regularly. ## A couple of litres of petrol in a diesel — too much? Litres aren't the measure. Proportion is, and far more than either, it counts if anything has been run. What determines how much work is required is if that mix has been sucked through the fuel system — because though five litres in a nearly empty tank is a distinct situation from five in a full one, either way that's the query. ## Already driven it with petrol in your diesel? What now? Somewhere safe, then stop, then switch off and keep it off. It is salvageable far more commonly than people fear, even though driving is what takes the issue from that tank into the pump and injectors — and the single most useful thing you can do now is not restart it. ## Is a fuel drain going to void my warranty? A drain and flush carried out correctly is not an alteration and does not void a manufacturer's warranty. Another good reason to leave it turned off: running a diesel on petrol is the thing more likely to cause a disagreement with one. ## Two-stroke oil in the tank, and then home? Two-stroke oil solves a distinct problem, and an old one at that. Nothing it does puts back what petrol thinned. No. After that? 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? No. Our technicians drain and clean the car wherever it is, so there is no need to bring it to a main dealer. ## Waiting next to it? Turned off is how it remains. Turn it off somewhere sensible then leave it off, if you have already driven it. Cold and parked, a vehicle is in the best position available — and drivers fear this a lot more than the recovery rate warrants. Clearing misfuelled cars, Hailes Terrace and the rest of East Lothian, wherever they are. Roadside. Forecourt. Home.