Wrong Fuel In Car? Here’s What You Can Do:
Have you realised you’ve filled your diesel tank with AdBlue by mistake? Don’t panic — it’s a common issue for modern diesel vehicle drivers. With more cars using AdBlue systems, the number of drivers accidentally putting AdBlue into a diesel fuel tank has increased — but there’s a safe, fast solution.
However, most people barely realize that putting the incorrect fuel in the car can cause a breakdown.
Why This Happens
Many diesel vehicles today require AdBlue — a liquid solution used to reduce harmful nitrogen oxide (NOx) emissions. It’s stored in a separate tank and should never be mixed with diesel fuel. AdBlue and diesel are entirely different fluids: AdBlue doesn’t combust and can cause serious issues if it enters the fuel system.
Despite clear colour-coded filler caps and separate inlets, mistakes do happen. If your diesel car has an SCR system, you’ll recognise the blue AdBlue filler near the diesel cap — but in the rush or confusion at the pump it can still be easy to slip up.
What Happens if AdBlue Goes in the Diesel Tank
Putting AdBlue into your diesel tank has consequences because:
- AdBlue is water-based and will not ignite as fuel — the engine may fail to start.
- It can disrupt fuel lubrication and combustion, leading to injector and pump issues.
- Urea and water in AdBlue can be corrosive to metal fuel components and promote crystallisation/clogging in filters and lines.
Because of this, any AdBlue in the diesel system must be removed promptly to avoid damage.
24/7 Mobile wrong fuel removal. We’ll get you back on the road now.
Nationwide Immediate Call-Out by the leading wrong fuel recovery specialists
Call now on 0333 366 1081 for immediate assistance. Phones manned 24/7. Average time for us to reach you is 46 minutes. As wrong fuel rescue specialists, we aim to get you back on the road within 90 minutes of receiving your call.
What to Do Immediately
1. Stop the Vehicle Safely
If you realise you’ve put AdBlue in the diesel tank, the first thing to do is stop. Do not start the engine. Turning the vehicle on will circulate the contaminated fluid throughout the fuel system.
2. Call Fuel Fixer Right Away
Contact us immediately — the sooner we can attend, the less the risk of damage.
3. Don’t Try DIY Draining
Attempting to drain the tank yourself can push contaminant deeper into the fuel lines or system components. Professional extraction prevents long-term issues.
If you’ve accidentally put AdBlue in your diesel tank,
Fuel Fixer can sort it out fast — without unnecessary delays or costly garage bills.
We’ll drain, flush and get you safely back on the road.
AdBlue Removal Service
At Fuel Fixer, we deliver a full site-ready service for AdBlue contamination:
We come to your vehicle with specialist fuel extraction equipment and:
- Drain all contaminated diesel/AdBlue mix
- Flush the entire fuel system thoroughly
- Replace any contaminated filters (if needed)
- Ensure all AdBlue residues are removed
This approach prevents corrosion, deposits and costly future repairs.
Nationwide Call-Out: Our mobile team is available 24/7 across mainland UK — roadside, at home, or on the forecourt. Typically we’ll have you back on the road quickly and safely.
No Towing Delays: There’s no need for expensive towing or dealership visits — we fix it on the spot in most cases.
AdBlue FAQs
Can a small bit of AdBlue be OK?
Even a small amount can damage the fuel system if left untreated. Always stop and call a professional.
Is my engine permanently damaged?
Not necessarily — if dealt with promptly. Extraction and a full system flush prevent ongoing harm.
Can I just refill with diesel?
No — adding diesel without removing AdBlue won’t fix the contamination and can push it into vital components.