--- title: Wrong fuel questions in Wales | Fuel Fixer url: https://fuelfixer.wales/answers/ focus: wrong fuel questions in wales phone: 01295 380724 area: Wales updated: 2026-11-01 --- # Wrong fuel questions in Wales **Short answer** Wrong fuel questions in Wales: straight answers to what Welsh drivers actually ask. Fuel Fixer Wales is Welsh-staffed and drains petrol from diesel, diesel from petrol, AdBlue and red diesel on-site anywhere in Wales, usually within 45 to 90 minutes of arriving, from £89. We also collect and dispose of waste fuel, heating oil and kerosene under licence. Do not start the engine — call 01295 380724. [Call 01295 380724 — 24/7, all of Wales](tel:+441295380724) All 22 council areas, 258 places. Tap a council area to see inside it. **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. Reviewed by [**Rambo S** ](/editorial/), Wrong fuel expert, Fuel Fixer · last checked 1 November 2026 ## Answers [I put petrol in my diesel car what do i do?](/answers/i-put-petrol-in-my-diesel-car-what-do-i-do/)[How much does it cost to drain wrong fuel in wales?](/answers/how-much-does-it-cost-to-drain-wrong-fuel-in-wales/)[Can i drive with the wrong fuel in my car?](/answers/can-i-drive-with-the-wrong-fuel-in-my-car/)[Who can drain wrong fuel near me in wales?](/answers/who-can-drain-wrong-fuel-near-me-in-wales/)[What happens if you put adblue in the diesel tank?](/answers/what-happens-if-you-put-adblue-in-the-diesel-tank/)[Is red diesel illegal in a road car in wales?](/answers/is-red-diesel-illegal-in-a-road-car-in-wales/)[Does car insurance cover misfuelling in the uk?](/answers/does-car-insurance-cover-misfuelling-in-the-uk/)[How long does a mobile fuel drain take?](/answers/how-long-does-a-mobile-fuel-drain-take/)[Will the wrong fuel damage my engine?](/answers/will-the-wrong-fuel-damage-my-engine/)[What should i do if i have already started the engine after misfuelling?](/answers/what-should-i-do-if-i-have-already-started-the-engine-after-misfuelling/)[What are the symptoms of putting petrol in a diesel car?](/answers/what-are-the-symptoms-of-putting-petrol-in-a-diesel-car/)[I put diesel in my petrol car will it be ok?](/answers/i-put-diesel-in-my-petrol-car-will-it-be-ok/)[How do i dispose of old petrol in wales?](/answers/how-do-i-dispose-of-old-petrol-in-wales/)[Can you drain fuel at a motorway service station?](/answers/can-you-drain-fuel-at-a-motorway-service-station/)[How much wrong fuel is too much?](/answers/how-much-wrong-fuel-is-too-much/)[Do i need a waste transfer note for waste fuel in wales?](/answers/do-i-need-a-waste-transfer-note-for-waste-fuel-in-wales/)[Who regulates waste fuel disposal in wales?](/answers/who-regulates-waste-fuel-disposal-in-wales/)[What does Natural Resources Wales require for waste fuel?](/answers/what-does-natural-resources-wales-require-for-waste-fuel/)[How do i empty a heating oil tank in wales?](/answers/how-do-i-empty-a-heating-oil-tank-in-wales/)[Can i put the wrong fuel in a hire car?](/answers/can-i-put-the-wrong-fuel-in-a-hire-car/)[What happens if you put petrol in a diesel van?](/answers/what-happens-if-you-put-petrol-in-a-diesel-van/)[Is misfuelling covered by breakdown cover?](/answers/is-misfuelling-covered-by-breakdown-cover/)[How do you get water out of a diesel tank?](/answers/how-do-you-get-water-out-of-a-diesel-tank/)[What is diesel bug and how do you treat it?](/answers/what-is-diesel-bug-and-how-do-you-treat-it/)[Can you drain fuel from a boat in wales?](/answers/can-you-drain-fuel-from-a-boat-in-wales/)[How much does adblue contamination cost to fix?](/answers/how-much-does-adblue-contamination-cost-to-fix/)[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/)[Is there a wrong fuel service in mid Wales?](/answers/is-there-a-wrong-fuel-service-in-mid-wales/)[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/)[Can a garage drain the wrong fuel for me?](/answers/can-a-garage-drain-the-wrong-fuel-for-me/)[Do i have to tell my insurance about misfuelling?](/answers/do-i-have-to-tell-my-insurance-about-misfuelling/)[What happens to the wrong fuel after it is drained?](/answers/what-happens-to-the-wrong-fuel-after-it-is-drained/)[Is it cheaper to drain fuel or repair the engine?](/answers/is-it-cheaper-to-drain-fuel-or-repair-the-engine/)[Can you put diesel in a petrol lawnmower?](/answers/can-you-put-diesel-in-a-petrol-lawnmower/)[How do i know if i have put the wrong fuel in?](/answers/how-do-i-know-if-i-have-put-the-wrong-fuel-in/)[What is the fine for using red diesel on the road?](/answers/what-is-the-fine-for-using-red-diesel-on-the-road/)[Can you drain a full tank of wrong fuel?](/answers/can-you-drain-a-full-tank-of-wrong-fuel/)[What do I do if I misfuel on the A470?](/answers/what-do-i-do-if-i-misfuel-on-the-a470/)[Is there a fuel drain service near me in Wales?](/answers/is-there-a-fuel-drain-service-near-me-in-wales/)[How much does it cost to drain a diesel tank?](/answers/how-much-does-it-cost-to-drain-a-diesel-tank/)[I drove 5 miles with the wrong fuel, what now?](/answers/i-drove-5-miles-with-the-wrong-fuel-what-now/)[I put 5 litres of petrol in my diesel, is that a problem?](/answers/i-put-5-litres-of-petrol-in-my-diesel-is-that-a-problem/)[What happens if you put unleaded in a diesel car?](/answers/what-happens-if-you-put-unleaded-in-a-diesel-car/)[Can you drain wrong fuel at a petrol station forecourt?](/answers/can-you-drain-wrong-fuel-at-a-petrol-station-forecourt/)[How do I get the wrong fuel out of my car?](/answers/how-do-i-get-the-wrong-fuel-out-of-my-car/)[What does a fuel doctor do?](/answers/what-does-a-fuel-doctor-do/)[Is wrong fuel covered by the AA or RAC?](/answers/is-wrong-fuel-covered-by-the-aa-or-rac/)[How much does it cost to drain a petrol tank?](/answers/how-much-does-it-cost-to-drain-a-petrol-tank/)[What happens if you put diesel in a petrol van?](/answers/what-happens-if-you-put-diesel-in-a-petrol-van/)[Can I still drive after putting AdBlue in the fuel tank?](/answers/can-i-still-drive-after-putting-adblue-in-the-fuel-tank/)[Who do I call for wrong fuel in Cardiff?](/answers/who-do-i-call-for-wrong-fuel-in-cardiff/)[How long does it take to fix wrong fuel in a car?](/answers/how-long-does-it-take-to-fix-wrong-fuel-in-a-car/) ## Wrong fuel questions in Wales: how it works Service | Mobile wrong-fuel drain and flush | Covers | Petrol in diesel, diesel in petrol, AdBlue, red diesel, contaminated fuel, collection and disposal | Area | All 22 Welsh council areas, coast, valleys and mountains | Places covered | 258 | Typical cost | £199 – £1,999, quoted before we travel | Time on site | 45–90 minutes | Waste regulator | Natural Resources Wales | 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) ## What it costs 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 | ### 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/) ## 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 Wales?** 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 Wales?** 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 Wales?** 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. [Call 01295 380724 — 24/7, all of Wales](tel:+441295380724) ### 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: [Natural Resources Wales waste regulation](https://naturalresources.wales/guidance-and-advice/business-sectors/waste-management/). 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/).