Restore lost power and fuel economy to your engines.
A hydrogen-based carbon clean for bus, coach and truck fleets. Done at your site in around an hour, with nothing removed from the engine.
On-site fleet clean
Proud to be a trusted supplier member of the Confederation of Passenger Transport.
Over time, engines choke themselves.
Even with the best servicing, carbon builds up where it does the most damage. Combustion chambers, valves, fuel injectors, EGR valves and exhaust systems all clog over the miles. Power drops, fuel economy slips and emissions climb.
It isn't only wear and tear. The engine is slowly choking itself.
A clean, not a strip-down.
Our hydrogen-based process clears that carbon out without removing a single component. It takes as little as an hour per vehicle, so downtime stays to a minimum.
- Restores power and performance
- Restores mpg by up to 15%
- Removes carbon deposits
- Reduces exhaust emissions
- Prolongs component life
- Lowers engine running temperatures
- Works as early intervention before bigger build-ups
- Helps pinpoint faults behind carbon build-up
A service that works around your operation.
We come to you, from a single vehicle to a full fleet, anywhere in the UK.
- On-site service at your depot
- Overnight and weekend slots to avoid downtime
- Vehicle meet-up service
- UK-wide drop-in days, by appointment
- Call-out service
We'll tell you straight.
No manufacturer will tell you their engine carbons up, but it's a fact of how combustion engines work over time. Where there's a build-up or blockage, there's often an underlying fault behind it.
Moving to zero emissions won't happen overnight, and combustion vehicles will be on the road for years yet. Keeping those engines running cleanly and efficiently is good for your running costs and good for the environment. That's the job we do.
Operators already trust us.
We've carried out work for established passenger-transport and commercial operators across the country.
- Nu-Venture Buses
- Cozy Travel
- DM Motor Services
- Lodge's Coaches
- J&C Coaches
"We recently had a hydrogen carbon cleaning treatment carried out by H2 Carbon Clean on one of our 2023 Neoplan Tourline coaches, which operates on our long-distance scheduled services. After putting the coach back into regular operation and monitoring its fuel consumption, we saw an improvement of approximately 3mpg compared with its previous average. With the high mileage our vehicles cover, even a modest improvement in fuel economy makes a real difference to our operating costs. The coach has also felt smoother to drive, and we're very pleased with the results we've seen. Based on our experience, we'd have no hesitation in recommending hydrogen carbon cleaning as part of a preventative maintenance programme."
"Straightforward and professional, with no vehicles off the road during the day. We've put the whole fleet on a regular schedule now."
"Sceptical at first, but the mpg gain paid for the job inside two months."
What fleet managers ask us.
Does it work on Euro 6 engines?
Yes. The process is compatible with all generations of diesel and petrol engine, including Euro 6. It's particularly effective on modern engines where DPF and EGR systems are prone to carbon-related issues.
How do you connect to the engine?
We feed hydrogen gas into the air intake while the engine is running at idle. Nothing is removed from the vehicle, and no mechanical work is carried out. The process runs for around an hour per vehicle.
Do you need power on site?
Yes, we need a standard 240V mains supply. We'll confirm this with you before booking. In most cases a depot or yard will have what's needed, and we can also discuss options if yours doesn't.
Does it affect the vehicle warranty?
No components are removed and nothing is introduced into the fuel system, so the process doesn't void manufacturer warranties. We'd always recommend confirming with your own fleet engineer if you have any specific concerns.
How often should we have it done?
For a working fleet, we suggest every 30,000–50,000 miles, or annually as a minimum. Vehicles operating in urban stop-start conditions — including bus and coach routes in 20mph zones — may benefit from more frequent cleans.
Can it help with a failing DPF or EGR valve?
In many cases, yes. A carbon clean can help restore partial function and extend the life of a DPF or EGR valve before replacement becomes necessary. We'll always give you an honest assessment of what to expect before we start.
Do you work on trucks and HGVs as well as buses and coaches?
Yes. We work across the full range of commercial vehicles — buses, coaches, trucks, HGVs, vans and more. Our equipment is heavy-duty and industrial grade, built for large engines and high-volume fleet work.
Does it work with retrofitted Euro VI systems?
Yes. The process works fine where older vehicles have had equipment retro-fitted to Euro VI standards for clean air zones. Where telematics are being correctly utilised, you'll also see improved results in the data.
Is the process finished once the H2 Carbon Clean cycle is completed?
No. At that point, carbon deposits have had hydrogen infused into them. The softened carbon will continue to break down over the days following the process, and in many cases the outcome continues to improve. We recommend a 30-minute drive at higher revs immediately after the machine cycle, to take advantage of the hydrogen being at its optimum.
Tell us about your fleet.
Send a few details and we'll take it from there — a single vehicle or a full fleet, anywhere in the UK.