--- title: Fuel Drain in The Dock — Petrol in a Diesel Car canonical: https://www.petrolinadieselcar.co.uk/petrol-in-diesel/the-dock-highland/ location: The Dock county: Highland latitude: 57.565780 longitude: -4.171350 service: Petrol in a Diesel Car updated: 2026-10-16 --- # Put Petrol in a Diesel Car in The Dock? Don't Start It With the tank still carrying the petrol and the motor not yet started, almost every job needs only a drain, so keep the motor off. That result is settled in the minutes straight after filling up, and not by the amount that was put in. All over The Dock and the rest of Highland, Petrol in Diesel drains the car and cleans it where it stands, whether at a roadside, on a drive or at a forecourt. Call us before all else happens, and you'll know what happens next. ## What to do next about petrol in a diesel - As you drive, the pump and the injectors suffer. This is why you never crank it, and why you don't trust it once it has started. The catch about petrol in a diesel especially — the point drivers get wrong — is that it pulls away fine for the first mile or two. Diesel in a petrol engine generally cannot run at all, which stops the person and stops the harm with them. This one lets you carry on. - Diesel ignites, and before it ignites it protects — the high-pressure fuel pump, those injectors. Petrol manages only the burning. So leave the ignition alone too: turning it on is frequently all it takes to prime that system, and priming carries petrol from your tank into precisely those parts. - Topping up gets rid of nothing. It gives you a bigger tank of the same mix, since a diesel fuel system does not tolerate petrol by percentage as that guidance suggests — so don't add diesel on top to water down it. Grade is irrelevant too: super unleaded is petrol. - A car that has not shifted is the simplest one to handle, so stay where you are if you safely can. Pulled up on the verge on Dock? Hazards on, then leave it there. An awkward location suits us better than a started diesel. - Before you dial, work out your position. Anything next to you with a sign on it, plus a postcode that starts IV9 8 — that's what decides whether the van turns up or circles. - Call 0333 366 0103. Expect three things — what was put in, about how many litres, and if your car has been started. Your answers settle all that comes after. The trip back would about double it, for no purpose at all. One commute has already forced a real load of petrol-thinned diesel through your high-pressure pump of your Renault Megane. So keep the vehicle where it is. Ring us from the platform if that's quicker — no one needs you hovering over your car outside Inverness Airport whilst our technicians get it done, and tonight trumps finding out on Monday. ## Pump-side draining for petrol in a diesel Most of this job starts at a pump, meaning a big part of it gets completed there. Still at Fraser's Garage? Then that's normally where it gets done. Garage forecourts are routine for us, with the permission of the station. No place other than a garage can this be stopped with your engine still cold. The few seconds between reading your receipt and going for the keys decide how much needs cleaning. Anywhere other than a forecourt — a car park, a drive, a lay-by — the car was fired up and moved to get there, so fuel was sucked from that tank, through your filter then into the high-pressure fuel pump. That means your lines and your filter require cleaning as well as your tank. It is not a calamity, and our technicians can still sort it out where the vehicle sits. Roll it out of the way if the staff offer, and they normally will. The next driver gets by the pump, and that's worth doing. Moving it four lengths doesn't warrant starting the motor. The phone call our engineers like runs like this: diesel Volkswagen Tiguan, a few litres of unleaded, driven a couple of miles, now switched off at Co-op Food. What we are really asking is how much fuel your pump has pulled — not how long ago it was. ## The Dock and the areas next to it The Dock is a residential suburb, and our technicians get out to it and to anywhere by it on those same trips: Avoch, Broomhill, Fortrose, Killen and Rosemarkie. If yours is not on that list it doesn't mean we don't come — there are separate pages for nearly all places in Highland, and the ones named above are just the closest neighbours. Call us to ask rather than presuming — county lines especially, and anywhere the satnav can struggle with. This map outlines the ground this page includes. All of that is ground we serve: a kerbside, a forecourt, a driveway, a car park. You never move your car anywhere. Put diesel in a petrol car and generally it will not run, so the person stops there and the damage stops with them. Swap it — petrol into a diesel — and the car fires up, idles and drives off as though nothing had happened, while the high-pressure pump works without the protection your fuel is meant to be giving. That is the catch, and it's why the diesel BMW 3 Series will have seemed perfectly normal coming back from the local primary school. They all do. From the driver's seat there's nothing to caution you about, and so nothing alerts you. Call us with about how far you drove, and how hard; the second answer matters more than the first. ## The Dock: stranded wherever you stopped Some drivers find no safe spot to stop whatsoever. Hazards on at a lay-by somewhere, or pulled onto the verge beside Shore Street because you realised after setting off — we take that call so often that it's the normal kind. Remain by the car if it is safe to sit inside, yet clear of it when it isn't. Do not fire up the motor to nurse the car somewhere handier — a diesel running on petrol will often oblige, and every mile it obliges for is drawing the mixture further into your fuel system. A technician heading to an awkward place is no problem for us, and it's much better for your car than carrying on. ## A couple of miles on petrol in a diesel: what next? This is where your M90 comes into it — over 50 miles from The Dock. A wrongly fuelled diesel will usually take you onto it and some way along before anything seems wrong, and the symptoms when they arrive are normally lost power, a lumpy idle and some smoke rather than a neat stop. The first sensible junction is the one to take. Turn off there, and leave the restarting alone. Presume the worst of it on a long drive. Anything close to the under 10 miles to the closest city, and the petrol has been through the fuel filter, through your pump, through the injectors. Tell us when you call. What our engineers bring differs. Your pump isn't turning, and so whatever your diesel Audi A3 did on the way to Craig Wood, none of it is going on now. Nothing is getting worse whilst it stands. Take your time over this — but never drive the vehicle home to buy any. ## Where's The Dock? The Dock is a small suburban area situated on the coast of the Moray Firth in Highland, Scotland, with a population of around 794 residents. The Dock is characterized by its semi-detached housing and low elevation of 6 metres above sea level. The Dock is located near several other communities, including Avoch, Broomhill, and Fortrose, and is approximately 6 miles from the city of Inverness. ## Our visit in The Dock, step by step - Three things get checked before any quote — your fuel that was put in, the amount, and whether anything has been run since. Each answer alters the work. - The tank gets cleared completely. - Lines cleaned, filter cleared. Whatever is left afterwards isn't the thing that caused the trouble. - Clean diesel goes in, and then the system gets primed. - Your engine is turned on and tested to be sure it runs properly on new diesel. Then it's ready to set off. All of it is done where the car is, so it never has to go to a garage, and when it has been spotted early, long-term damage is very rare. ## A separate matter: AdBlue in a diesel tank in The Dock AdBlue instead of petrol? Then the first instruction is unchanged — the motor remains off — while the issue under it's a different one altogether. Thinned diesel, and no protection left for the system that relies on it. That is petrol. Corrosion and residue are what a diesel tank gets instead, because AdBlue is urea dissolved in water. Our engineers cover both, and AdBlue removal around The Dock has its own page with the detail — including why it's frequently the more significant of the two. A car you collected two days ago gets driven further before anyone sees anything, which is the hire and courtesy issue in one sentence — and how far it went is what determines the quantity of petrol reaching your injectors. Nothing sloppy about the mistake itself: a current diesel filler neck accepts the smaller petrol nozzle with practically no resistance, so unfamiliar places see most of these. Call us from wherever you are, near Avoch Parish Church or not, and we will head to the Ford Kuga. ## What a petrol-in-diesel fuel drain costs in The Dock What shifts the figure is listed below, since the job isn't one job and our technicians can't frankly put a single figure on this page. - Started? Driven? Either answer counts more than anything else on this list. - How much of the wrong fuel went in, against how much that tank can hold. - Which got in: petrol or AdBlue. - Where the car is, and if a van can sensibly get to and work on it. Tell us what the car is, how much went in, and if your motor has run. A straight answer comes back, not a range. Not pressing, with the car at home and going nowhere? Then does this job. ## Petrol in diesel: common questions around The Dock ## I'm on a forecourt in The Dock. Can you drain the car here? Yes, and it is where a big share of this work happens. Routinely, provided the site consents: another forecourt nearby, plus every other forecourt nearby. Say on the phone where exactly you have stopped. Whether our technicians can work in that place is something we answer on the spot. ## How much petrol in a diesel is too much? Proportion decides it instead of litres — and more than either, whether the motor has run. Five litres in an almost empty tank is a distinct matter from five in a full one — but either way, the thing that settles how much work is needed is whether that mix has been sucked through the fuel system. ## Already driven it with petrol in the diesel? What then? Turn off somewhere sensible, then keep it that way after you stop. Not restarting it is the single most valuable thing available to you now. Driving does shift the problem out of the tank and into the pump and injectors, yes, and it remains salvageable far more commonly than drivers expect. ## Will a fuel drain void my warranty? A manufacturer's warranty outlasts a drain and flush done to a good standard, which is no change at all. Running a diesel on petrol is the thing more likely to cause a disagreement with one, which is another reason to leave the vehicle switched off. ## Two-stroke oil in that tank, and then home? No. It belongs to a separate issue from a different era, and petrol has diluted something no oil of that kind replaces. Your pump still has to cope with it, because your tank still has petrol in it later on. ## A main dealer for petrol in a diesel — essential? Wherever the vehicle is, we drain and flush it there, so a drive to the main dealer doesn't come into it. ## Waiting next to it? Your engine stays off. Already driven it? Then stop somewhere safe, switch off, then let the vehicle stay that way. This is recoverable from much more often than drivers expect, and a stationary, cold vehicle is the best position to be in. On-site fuel draining in The Dock and throughout Highland — at the kerbside, on the forecourt or at home.