--- title: Wrong fuel in Gwynedd? 16 places covered url: https://fuelfixer.wales/coverage/gwynedd/ focus: wrong fuel in gwynedd phone: 01295 380724 area: Wales updated: 2026-10-31 --- # Wrong fuel in Gwynedd? We come to you **Short answer** Wrong fuel in Gwynedd? Do not start the engine and call 01295 380724. A mobile technician attends 16 towns, villages and districts across the council area — including Bangor, Caernarfon, Bethesda, Porthmadog, Pwllheli, Blaenau Ffestiniog — drains the contaminated fuel on-site, flushes the lines and refills with clean fuel. Typically 45 to 90 minutes, £199 to £1,999, quoted before we travel. Access across Gwynedd is via the A487, A470, A55 and A499, and we work Snowdonia passes, the Llŷn peninsula and coastal forecourts. [Call 01295 380724 — 24/7, all of Wales](tel:+441295380724) Gwynedd — 16 places covered · postcode districts LL23, LL36, LL40, LL41, LL42, LL49, LL52, LL53 - LL23 - LL36 - LL40 - LL41 - LL42 - LL49 - LL52 - LL53 **Welsh team, local drainers** A Welsh team and local drainers working every council area from Anglesey to Monmouthshire. Owned and run by Fuel Fixer Ltd — we are not a Welsh-owned company, and we do not claim to be. ## Wrong fuel in Gwynedd at a glance Council area | Gwynedd | Places covered | 16 | Postcode districts | LL23, LL36, LL40, LL41, LL42, LL49, LL52, LL53, LL55, LL57 | Trunk roads | the A487, A470, A55 and A499 | Typical call-outs | Snowdonia passes, the Llŷn peninsula and coastal forecourts | Covers | Petrol in diesel, diesel in petrol, AdBlue, red diesel, contaminated fuel, collection and disposal | Typical cost | £199 – £1,999 | Time on site | 45–90 minutes | Attendance | Usually same day, 24/7 | Helpline | 01295 380724 — 24 hours, 7 days | ## What to do right now - Do not turn the key or start the engine — that is what turns a drain into a repair. - Do not move the vehicle. On a forecourt, apply the handbrake and tell the station staff. - Call 01295 380724 with your location, your vehicle and which fuels were mixed. You get the price before we set off. - A technician attends with a licensed drainage unit and makes the area safe. - The contaminated fuel is pumped out and the fuel lines are flushed through. - Clean fuel goes in, the vehicle is started and checked, and you drive away. The waste fuel leaves with us for compliant disposal. [Call 01295 380724 now](tel:+441295380724) ## Fuel drain prices in Gwynedd Call-out is £89 to £199 and the drain itself is £199 to £1,999. The two are quoted separately, and your exact price is confirmed on the phone before a technician sets off. Remote upland and coastal jobs are quoted with travel included, so the figure you are given is the figure you pay. Your situation | What is involved | Typical cost | Time on site | Spotted it, engine never started | Drain the tank, flush the lines, refill with clean fuel | £199 | 45–90 mins | Engine started but not driven | Drain plus a flush of the lines and filter | Mid range | 1–2 hours | Driven a short distance | Drain, flush and a check of the pump and injectors | Higher | 1–3 hours | Driven until it lost power or cut out | Drain, flush and fuel-system diagnosis | Upper end | Assessed on site | AdBlue in the diesel tank | Full drain and flush of tank and fuel lines | Quoted per vehicle | 1–3 hours | [Call 01295 380724](tel:+441295380724) ## What we do across Gwynedd [**Wrong fuel** Whatever went in the tank comes out before the engine runs. One call, one technician, one visit, anywhere in Wales.](/wrong-fuel/)[**Petrol in a diesel car** Petrol strips the lubrication diesel gives the pump and injectors, so it has to come out before the engine runs.](/petrol-in-diesel/)[**Diesel in a petrol car** Diesel will not ignite on a spark, so the engine misfires, smokes or refuses to start. A drain normally resolves it.](/diesel-in-petrol/)[**AdBlue in the diesel tank** AdBlue is corrosive to fuel-system components. It is a contamination problem and needs a full drain and flush.](/adblue-in-diesel-tank/)[**Unleaded in diesel** Unleaded is petrol. In a diesel tank it strips the lubrication the high-pressure pump and injectors rely on.](/unleaded-in-diesel/)[**Red diesel in a road vehicle** Red diesel in a road vehicle is a mechanical problem and an HMRC problem at once. It is drained, flushed and disposed of under licence.](/red-diesel-in-tank/)[**Contaminated or bad fuel** Water, diesel bug, debris or stale fuel behaves like a misfuel. Same fix: full drain, flush, clean fuel in.](/contaminated-fuel/)[**Mobile fuel drain** The contaminated fuel is pumped out where the vehicle stands, the lines are flushed and clean fuel goes in. No tow, no garage.](/mobile-fuel-drain/)[**Fuel doctor** A fuel doctor is a mobile wrong-fuel specialist. We attend, diagnose, drain and flush where the vehicle stands.](/fuel-doctor/)[**Misfuelling** Misfuelling is the trade word for putting the wrong fuel in. It is fixed on-site with a drain and a flush.](/misfuel/)[**Symptoms of the wrong fuel** Misfire, smoke, knocking, loss of power or a refusal to restart shortly after filling up. Pull over, switch off, call.](/wrong-fuel-symptoms/)[**What a fuel drain costs** Most jobs fall between £199 and £1,999. The price is confirmed on the phone before a technician sets off.](/wrong-fuel-cost/)[**Damage, repairs and insurance** Caught before starting, damage is rare. Once the engine has run, the pump and injectors are involved and the job grows.](/wrong-fuel-damage/)[**Wrong fuel in a van, HGV or fleet vehicle** Commercial vehicles carry more fuel and cost more per hour off the road. Vehicles over 3.5 tonnes are quoted separately.](/wrong-fuel-in-a-van/)[**Wrong fuel in a boat or marine tank** Marine tanks are large, baffled and often below deck. Fuel is uplifted quayside or afloat and taken away under licence.](/wrong-fuel-in-a-boat/)[**Screen wash in the AdBlue tank** Screen wash dilutes the urea solution and the SCR system reads it as out-of-spec AdBlue. The tank is drained and flushed before the dosing pump is run.](/screen-wash-in-adblue-tank/)[**AdBlue in the screen wash tank** AdBlue in the washer bottle crystallises in the jets and lines and leaves a white residue on the glass. The bottle and lines are flushed out.](/adblue-in-screen-wash-tank/)[**Diesel in the AdBlue tank** Diesel contaminates the urea solution and can damage the SCR catalyst and dosing system. It is drained before the engine is run.](/diesel-in-adblue-tank/)[**AdBlue in the petrol tank** AdBlue is water-based and corrosive to fuel-system components. In a petrol tank it needs a full drain and flush before starting.](/adblue-in-petrol-tank/)[**Petrol in the AdBlue tank** Petrol in the AdBlue tank contaminates the urea and risks the dosing pump and SCR catalyst. The tank is drained and flushed.](/petrol-in-adblue-tank/)[**Water in the diesel tank** Water sinks below the diesel and gets drawn into the pump, where it strips lubrication and corrodes injectors. It is drained and the tank dried out.](/water-in-diesel-tank/)[**Water in the petrol tank** Water in petrol causes misfire, hesitation and a refusal to start. The tank is drained, the lines flushed and clean fuel put in.](/water-in-petrol-tank/)[**Water in the AdBlue tank** AdBlue is already a precise 32.5% urea solution, so added water puts it out of spec and the system flags a fault. The tank is drained and refilled.](/water-in-adblue-tank/)[**Water in the screen wash tank** Plain water in the washer bottle freezes, splits the bottle and blocks the jets. It is drained and refilled with proper screen wash.](/water-in-screen-wash-tank/)[**Screen wash in the petrol tank** Screen wash is water and alcohol. In a petrol tank it will not burn properly and needs draining before the engine is started.](/screen-wash-in-petrol-tank/)[**Screen wash in the diesel tank** Screen wash strips the lubrication diesel gives the high-pressure pump, exactly as petrol does. The tank is drained and flushed.](/screen-wash-in-diesel-tank/)[**Wrong fluid in any tank** Whatever went into whichever tank, it comes out before the engine runs. Fuel, AdBlue, screen wash, coolant or water.](/wrong-fluid-in-tank/)[**Fuel collection** Surplus, off-spec or unwanted fuel collected from tanks, drums and bowsers by a registered waste carrier.](/fuel-collection/)[**Contaminated fuel collection** Water-ingressed, bugged or mixed fuel uplifted from your tank, with a waste transfer note issued on site.](/contaminated-fuel-collection/)[**Fuel disposal** Fuel is a controlled waste under Welsh environmental law. It is collected under licence and processed for recycling, never poured away.](/fuel-disposal/)[**Farm and agricultural fuel collection** Farm bowsers, bunded steadings and estate tanks emptied across rural Wales, with consignment paperwork issued on site.](/agricultural-fuel-collection/)[**Commercial and depot fuel uplift** Depot, forecourt and bunded commercial stores surveyed, pumped out and documented under a single duty-of-care chain.](/commercial-fuel-uplift/)[**Local Welsh fuel drainer** ](/welsh-fuel-drainer/)[**Local Welsh old petrol collector** ](/welsh-old-petrol-collector/)[**Local Welsh old petrol disposal** ](/welsh-old-petrol-disposal/)[**Local Welsh old diesel collector** ](/welsh-old-diesel-collector/)[**Local Welsh old diesel disposal** ](/welsh-old-diesel-disposal/)[**Local Welsh red diesel collector** ](/welsh-red-diesel-collector/)[**Local Welsh red diesel disposal** ](/welsh-red-diesel-disposal/)[**Local Welsh kerosene collector** ](/welsh-kerosene-collector/)[**Local Welsh kerosene disposal** ](/welsh-kerosene-disposal/)[**Local Welsh heating oil collector** ](/welsh-heating-oil-collector/)[**Local Welsh heating oil disposal** ](/welsh-heating-oil-disposal/) ## Every place we cover in Gwynedd [Bangor](/areas/bangor/)[Caernarfon](/areas/caernarfon/)[Bethesda](/areas/bethesda/)[Porthmadog](/areas/porthmadog/)[Pwllheli](/areas/pwllheli/)[Blaenau Ffestiniog](/areas/blaenau-ffestiniog/)[Dolgellau](/areas/dolgellau/)[Barmouth](/areas/barmouth/)[Tywyn](/areas/tywyn/)[Bala](/areas/bala/)[Criccieth](/areas/criccieth/)[Upper Bangor Bangor](/areas/upper-bangor-bangor/)[Hirael Bangor](/areas/hirael-bangor/)[Maesgeirchen Bangor](/areas/maesgeirchen-bangor/)[Penrhosgarnedd Bangor](/areas/penrhosgarnedd-bangor/)[Glanadda Bangor](/areas/glanadda-bangor/) ### Other council areas [Isle of Anglesey](/coverage/isle-of-anglesey/)[Conwy](/coverage/conwy/)[Denbighshire](/coverage/denbighshire/)[Flintshire](/coverage/flintshire/)[Wrexham](/coverage/wrexham/)[Powys](/coverage/powys/)[Ceredigion](/coverage/ceredigion/)[Pembrokeshire](/coverage/pembrokeshire/)[Carmarthenshire](/coverage/carmarthenshire/)[Swansea](/coverage/swansea/)[Neath Port Talbot](/coverage/neath-port-talbot/)[Bridgend](/coverage/bridgend/)[Vale of Glamorgan](/coverage/vale-of-glamorgan/)[Cardiff](/coverage/cardiff/)[Rhondda Cynon Taf](/coverage/rhondda-cynon-taf/)[Merthyr Tydfil](/coverage/merthyr-tydfil/)[Caerphilly](/coverage/caerphilly/)[Blaenau Gwent](/coverage/blaenau-gwent/)[Torfaen](/coverage/torfaen/)[Monmouthshire](/coverage/monmouthshire/)[Newport](/coverage/newport/) ### Services [Wrong fuel](/wrong-fuel/)[Petrol in a diesel car](/petrol-in-diesel/)[Diesel in a petrol car](/diesel-in-petrol/)[AdBlue in the diesel tank](/adblue-in-diesel-tank/)[Unleaded in diesel](/unleaded-in-diesel/)[Red diesel in the tank](/red-diesel-in-tank/)[Contaminated fuel](/contaminated-fuel/)[Mobile fuel drain](/mobile-fuel-drain/)[Fuel doctor](/fuel-doctor/)[Misfuelling](/misfuel/)[Wrong fuel symptoms](/wrong-fuel-symptoms/)[Wrong fuel drain cost](/wrong-fuel-cost/)[Wrong fuel engine damage](/wrong-fuel-damage/)[Wrong fuel in a van](/wrong-fuel-in-a-van/)[Wrong fuel in a boat](/wrong-fuel-in-a-boat/)[Screen wash in the AdBlue tank](/screen-wash-in-adblue-tank/)[AdBlue in the screen wash tank](/adblue-in-screen-wash-tank/)[Diesel in the AdBlue tank](/diesel-in-adblue-tank/)[AdBlue in the petrol tank](/adblue-in-petrol-tank/)[Petrol in the AdBlue tank](/petrol-in-adblue-tank/)[Water in the diesel tank](/water-in-diesel-tank/)[Water in the petrol tank](/water-in-petrol-tank/)[Water in the AdBlue tank](/water-in-adblue-tank/)[Water in the screen wash tank](/water-in-screen-wash-tank/)[Screen wash in the petrol tank](/screen-wash-in-petrol-tank/)[Screen wash in the diesel tank](/screen-wash-in-diesel-tank/)[The wrong fluid in the tank](/wrong-fluid-in-tank/)[Fuel collection](/fuel-collection/)[Contaminated fuel collection](/contaminated-fuel-collection/)[Fuel disposal](/fuel-disposal/)[Agricultural fuel collection](/agricultural-fuel-collection/)[Commercial fuel uplift](/commercial-fuel-uplift/)[Welsh fuel drainer](/welsh-fuel-drainer/)[Welsh old petrol collector](/welsh-old-petrol-collector/)[Welsh old petrol disposal](/welsh-old-petrol-disposal/)[Welsh old diesel collector](/welsh-old-diesel-collector/)[Welsh old diesel disposal](/welsh-old-diesel-disposal/)[Welsh red diesel collector](/welsh-red-diesel-collector/)[Welsh red diesel disposal](/welsh-red-diesel-disposal/)[Welsh kerosene collector](/welsh-kerosene-collector/)[Welsh kerosene disposal](/welsh-kerosene-disposal/)[Welsh heating oil collector](/welsh-heating-oil-collector/)[Welsh heating oil disposal](/welsh-heating-oil-disposal/) ### Answers [What do I do if I misfuel on the M4?](/answers/what-do-i-do-if-i-misfuel-on-the-m4/)[What do I do if I misfuel on the A55?](/answers/what-do-i-do-if-i-misfuel-on-the-a55/)[Do you cover Anglesey for fuel drain?](/answers/do-you-cover-anglesey-for-fuel-drain/)[What is the phone number for a fuel drain in wales?](/answers/what-is-the-phone-number-for-a-fuel-drain-in-wales/)[How quickly can someone come out for wrong fuel?](/answers/how-quickly-can-someone-come-out-for-wrong-fuel/)[What do I do if I misfuel on the A470?](/answers/what-do-i-do-if-i-misfuel-on-the-a470/)[Is wrong fuel covered by the AA or RAC?](/answers/is-wrong-fuel-covered-by-the-aa-or-rac/)[Who do I call for wrong fuel in Cardiff?](/answers/who-do-i-call-for-wrong-fuel-in-cardiff/) ## What Welsh customers say Rated **4.8 out of 5** from **6,053** verified reviews on [Reviews.co.uk](https://www.reviews.co.uk/company-reviews/store/fuelfixer-co-uk). Reviews are collected independently and published in full — including the ones we would rather not have. Read every review on [Reviews.co.uk](https://www.reviews.co.uk/company-reviews/store/fuelfixer-co-uk) or on our [Google Business Profile](https://www.google.com/maps?cid=17001480993030321128). Live review feed loads here. If it does not appear, [read the reviews directly](https://www.reviews.co.uk/company-reviews/store/fuelfixer-co-uk). ## Common questions **Can I drive with wrong fuel?** No. Starting or driving pumps it through the system and can turn a straightforward drain into an expensive repair. Leave the vehicle where it is and call 01295 380724. **How long does the drain take in Gwynedd?** About 45 to 90 minutes on site once the technician arrives. Vehicles that were started or driven take longer, because the lines and filter need flushing as well as the tank. **How much does it cost in Gwynedd?** Most jobs fall between £199 and £1,999 depending on the vehicle, how much wrong fuel is in the tank and whether the engine was started. You get the price on the phone before we travel. **Will it have damaged the engine?** Only if it has been run through the system. Caught before starting, it sits in the tank and a drain removes it cleanly. **Does insurance cover it?** Often not. Most car insurance policies exclude misfuelling as standard, though some breakdown policies and optional add-ons include it. Check your own wording. **Do you cover rural and island Gwynedd?** Yes. Technicians attend forecourts, roadsides, homes, farms and workplaces across Wales, including the uplands and the islands. Remote jobs are quoted with travel included so the price does not move. ### Other sites in this network Fuel Fixer Wales is part of Stockbridge Capital Holdings › Fuel Fixer International › Fuel Fixer Ltd. The sites below are run by the same operator and differ in where and how people search. - [**Fuel Fixer** Wrong fuel across Scotland, plus Ireland · 01295 380724](https://fuelfixer.scot/) - [**Forecourt Assist** AdBlue contamination drains only · 01293 248666](https://adblueinfuel.co.uk/) - [**Forecourt Assist** Wrong fuel across Cumbria · 01293 248666](https://wrongfuelcumbria.co.uk/) - [**Forecourt Assist** Wrong fuel across Teesside · 01293 248666](https://wrongfuelteesside.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Carlisle · 01293 248666](https://wrongfuelcarlisle.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Darlington · 01293 248666](https://wrongfueldarlington.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Dumfries · 01293 248666](https://wrongfueldumfries.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Durham · 01293 248666](https://wrongfueldurham.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Gateshead · 01293 248666](https://wrongfuelgateshead.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Kendal · 01293 248666](https://wrongfuelkendal.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Keswick · 01293 248666](https://wrongfuelkeswick.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Maryport · 01293 248666](https://wrongfuelmaryport.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Middlesbrough · 01293 248666](https://wrongfuelmiddlesbrough.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Newcastle · 01293 248666](https://wrongfuelnewcastle.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Penrith · 01293 248666](https://wrongfuelpenrith.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Sunderland · 01293 248666](https://wrongfuelsunderland.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Whitehaven · 01293 248666](https://wrongfuelwhitehaven.co.uk/) - [**Forecourt Assist** Wrong fuel in and around Workington · 01293 248666](https://wrongfuelworkington.co.uk/) - [**Fuel Fixer** Misfuel help, organised by fuel mix-up · 01295 380724](https://mis-fueldoctor.co.uk/) - [**Fuel Fixer** The evidence base; home of every statistic · 01295 380724](https://wrongfuel.co.uk/) - [**Fuel Fixer** Local fuel drainers, area by area · 01295 380724](https://wrongfueldrain.com/) - [**Fuel Fixer** The group operating site · 01295 380724](https://fuelfixer.co.uk/) - [**Forecourt Assist** The operator: network directory and author page · 01293 248666](https://forecourtassist.co.uk/) Owned by [Stockbridge Capital Holdings](https://stockbridgecapitalholdings.com/). Background reading: [Traffic Wales](https://traffic.wales/). Operated by [Fuel Fixer](https://www.fuelfixer.co.uk/). For what wrong fuel does to an engine, see [Misfuel Doctor](https://mis-fueldoctor.co.uk/); south of the border, see [Wrong Fuel](https://wrongfuel.co.uk/).