Put diesel in your petrol car?
Stop — do exactly this, in order.
Real local engineers — tap to call
Why drivers call Fuel Fixer
- The specialists garages, dealers and insurers call. Wrong fuel is all we do — and no one does it better.
- Average arrival 46 minutes, Ireland-wide. Mobile units across Leinster, Munster, Connacht & Ulster.
- Open 7 days, 24-hour emergency lines. Someone answers, day or night.
- Every make and model — cars and hybrids, vans, HGVs, boats and plant.
- No tow. No garage bill. We fix it on the spot and you drive on — VAT invoice and engine report as standard.
- ISO 9001 & 14001 certified, environmentally compliant, licensed disposal.
Diesel in a petrol? Drained on the spot.
Petrol in a diesel
Petrol strips the lubrication a diesel system lives on, so it stalls or runs rough. Don’t drive it. We drain and flush the whole system, then hand you fresh fuel so you drive on.
Call about thisDiesel in a petrol
Diesel won’t burn in a petrol engine, so the car loses power and runs flat. We remove it on the spot, flush the lines and filters, and get you moving.
Call about thisContaminated fuel, a bad batch, water in the tank — same trouble, same fix. Whatever’s in there, we drain it.
Signs you’ve misfuelled
- Won’t start after filling up, or once it’s cooled down
- Loss of power, or the engine runs rough or misfires
- Fuel-pump failure, blocked lines or “vapour lock”
- White smoke from the exhaust after refuelling
- A dashboard warning light after filling up
Already driven on it?
Stop, switch off, and call. It’s rarely the disaster people fear — and no one puts it right like the market leaders.
Tell us what happened and our engineer assesses it with you, drains and flushes the system properly, and gives your engine the aftercare it needs. The sooner it’s out, the better the outcome.
Call — we’ll sort itHow bad is it, really?
Straight answer: it’s almost never the catastrophe people fear at the pump — provided the wrong fuel is drained before the engine is asked to run on it. What matters isn’t panic; it’s not turning the key, and getting it out quickly. Here’s what’s actually happening under the bonnet.
Petrol in a diesel
A diesel system isn’t just fed by its fuel — it’s lubricated by it. The high-pressure pump and injectors rely on diesel’s oiliness to protect fine metal tolerances. Petrol is a solvent: it thins that lubrication away. Run the engine and petrol is pushed through the pump and injectors dry, which is where real damage — and real bills — begin. Modern common-rail diesels are the most sensitive of all.
So don’t start it. Drained before it’s run, the outcome is almost always simply a clean system and a car that drives away. Left in and driven, it’s a gamble on the most expensive parts in the fuel system.
Diesel in a petrol
The mechanics run the other way. Diesel is too heavy and oily to burn in a spark-ignition petrol engine, so it doesn’t so much damage the system as choke it — fouling spark plugs, clogging the injectors and coating the lines. The car typically coughs, floods the exhaust with white smoke, loses power and cuts out.
It’s rarely terminal, but it won’t run right until every trace is flushed out. Same rule applies: don’t keep driving it — you’re only spreading diesel deeper through the system.
Either way, the fix is the same and it’s routine for us: drain the tank, flush the lines and filters, prime it with the correct fuel, and get you moving. Contaminated fuel, a bad batch or water in the tank behaves the same — and gets the same treatment.
A splash or a full tank — does the amount matter?
It’s the first thing people ask, so here’s the honest version: yes, the proportion changes the risk — but it does not change what you should do.
- A small splash in a large tank is diluted, and the danger is lower — but “lower” is not “none”. Petrol still strips lubrication in a diesel even at a few percent, so it isn’t something to simply top up and hope over.
- 10, 20 litres or a near-full fill is a serious proportion. At that level the wrong fuel dominates the tank, and running the engine on it is the version people regret. Don’t start it — this one needs draining.
- Guessing the exact percentage isn’t the point. You rarely know precisely how much went in, or how much was already in the tank. The safe move at any amount is identical: don’t turn the key, and let us measure and assess it properly.
When you call, tell us roughly how much wrong fuel went in and how full the tank was — it helps our engineer plan the drain before they even arrive. Whatever the amount, we remove it on the spot and hand you clean fuel to drive on.
Diesel in your petrol? Exactly what to do
If you haven’t driven off yet
- Don’t turn the key. Not even to move off the pump — that’s the single thing that turns a simple drain into a repair.
- Tell the forecourt staff; most will let you push the car clear of the pump to a safe spot.
- Put it in neutral, handbrake off, and push — don’t start it to reposition.
- Call us. We come to the forecourt, drain it there, and you drive away on clean fuel.
If you’ve already driven on it
- The moment it’s safe, pull over and switch off. Every mile spreads it further.
- Hazards on, get yourself and passengers somewhere safe off the carriageway.
- Don’t try to “run it through” or dilute it by brimming with the right fuel — that isn’t a fix.
- Call us and tell us what happened. Our engineer assesses it with you, drains and flushes the system, and gives the engine the aftercare it needs.
“Can I just drive it home?”
Please don’t. It’s the most common question and the honest answer is that driving on the wrong fuel is exactly how a five-minute roadside drain becomes a fuel-system repair. A diesel may run for a few miles on petrol before the damage shows; a petrol car on diesel will usually protest almost immediately. In both cases the car being drivable is not the same as it being safe to drive. The sooner the wrong fuel is out, the better every outcome — cost, damage and time.
What does it cost?
A fair question, and here’s a straight answer rather than a runaround: a roadside wrong-fuel drain costs a small fraction of what a main dealer charges to strip and replace fuel-system parts they’ll often tell you are ruined. That’s the whole reason drivers — and the garages themselves — call the specialists direct.
- One fixed job, quoted before we set off. You’ll know the price when you call — no meter running, no surprises when we arrive.
- What it depends on is simple and we’ll tell you plainly on the phone: where you are, your vehicle, and how much wrong fuel needs removing.
- No tow, no garage bill, no dealer mark-up. We fix it where you’re standing and you drive on — with a VAT invoice and engine report as standard.
Whatever a dealer estimate has frightened you with, call us first. In the vast majority of misfuels there’s nothing to replace at all — just the wrong fuel to remove — and you’ll have a firm price in the time it takes to answer a few questions.
If you care about your car, talk to the specialists.
Whatever’s in the tank, we drain it on the spot. Average arrival 46 minutes, anywhere in Ireland.
Call now01 506 0386A mobile unit near you now
Average arrival 46 minutes, right across Ireland — Dublin, Cork, Galway, Limerick, Waterford, Drogheda, Dundalk, Swords, Bray, Navan, Kilkenny, Sligo, Ennis, Tralee and everywhere between. Roadside, forecourt or home.
Whatever you drive
Whatever you searched, you’re in the right place
Wrong fuel in car, petrol in a diesel, diesel in a petrol, mobile fuel drain, contaminated fuel, 24-hour wrong-fuel help — it’s all we do. Tap the one that sounds like you.
We don’t just drain it — we dispose of it properly
The fuel we remove is never dumped. A licence is required to transport and store it; ours is held securely before it’s re-refined and returned to the fuel supply chain. It’s how it should be done.
Rated by drivers across Ireland
Thousands of drivers have called Fuel Fixer since 2009 — and rated us 4.8 out of 5 on Google and Reviews.io. When the worst happens at the pump, they call the specialists.
Read our reviews on Google & Reviews.io.
Wrong-fuel questions, answered
What should I do if I’ve put the wrong fuel in?
What’s worse — petrol in a diesel or diesel in a petrol?
How long does it take, and where do you come to?
Have I damaged my engine?
Do you cover the whole of Ireland?
Why not just go to a garage or main dealer?
What happens to the fuel you remove?
Does it matter how much wrong fuel I put in?
Can I drive it home if it seems to be running?
What actually happens if I run the engine on the wrong fuel?
Do you come to the petrol station forecourt?
Rather we called you?
Leave your number and we’ll ring you straight back — usually within minutes.
Wrong fuel in your car? Don’t drive — call.
The longer it’s in there, the more it can damage your engine. Get a misfuel expert to your car now.
Call now01 506 0386