Many companies in the commercial vehicle sector claim to have developed ground breaking technologies that promise benefits for business and the environment. But very few can boast the proud track record of Clean Air Power.

Our technology works – and not just in a laboratory or through limited trials. More than 2,700 trucks worldwide have been fitted with Clean Air Power’s Dual-Fuel technology, bringing significant cost reductions to their operators and wider benefits for the environment through lower emissions. But don’t take our word for it. Click below to read our case studies.

Bestway Express, Inc.

September 12, 2014

In 2011, Bestway Express, Inc. was awarded a large grant and were in the market for an EPA approved kit to run on Natural Gas. With Clean Air Power’s Legacy product being the only suitable solution, the two companies teamed up and were able to deliver 16 trucks. All were fitted with Clean Air Power’s Dual-Fuel™ retrofit system on a Caterpillar 410 horsepower C12 engine. The 16 installations have accumulated a combined total of over 4.7 million miles, with the highest unit at 450,000 miles. Obtaining CNG was a challenge at the beginning, and was brought in via fuel mule. As Bestway continues to grow their fleet, they have since built their own public CNG fueling station and are continuing to benefit from all the savings Natural Gas has to offer.

Headquartered in Vincennes, Indiana, Bestway is a family owned and operated trucking company with a growing fleet of 300 power units and 800 dry van trailers.

Will McCormick, Bestway:

“We saw the savings in CNG and knew that we could make it work, we just needed to find the right fit. It was a learning process for both companies. Communication being key, and not knowing too much about CNG and how it worked, Clean Air Power’s team was knowledgeable and friendly.”

Compressed Energy Systems

August 28, 2014

Chris Schimp owns a natural gas supply business in Eldorado, Illinois called Compressed Energy Systems. As Chris's interest in natural gas developed he quickly saw the opportunity for heavy-duty vehicles. He originally purchased used C12 Legacy units from a previous Clean Air Power customer and began running those in his own fleet. Subsequently he leased them to customers along with natural gas fuel. One of his customers is reporting over 80% gas substitution and is in the process of adding additional units to their fleet. 

Today Chris has built four new Peterbilt Gliders. His fleet also includes C15 Legacy systems which are rated at 500 horsepower. 

"The savings are amazing, and the flexibility of the Clean Air Power Dual-Fuel system makes these units a no-brainer for my customers. I am looking to expand my fleet of leave vehicles and to increase our sales of natural gas. This system maker is easy and all parties win." said Chris.

J. Sainsburys PLC

June 4, 2009

Sainsbury's are currently running 5 x Merc Axor 6x2 Tractor units operating from Emerald park and filling at Aust with Bio-methane produced from Gasrec’s Albury landfill site.

Clean Air Power are currently performing a fuel analysis on these vehicles which are operating in the South West of England (new Dartmouth site) and Wales (Swansea).

Murray Goulburn

May 21, 2009

From a starting fleet of 25 vehicles at a single location in 2005, Murray Goulburn Co-operative (MGC) now have 56 vehicles at two locations in Victoria converted to Dual-Fuel™ technology.

“Our trucks each travel an average of 200,000kms/year and on average consume 45-55 litres per 100kms. The majority of the fleet are Caterpillar C-12 powered trucks which use a PTO (Power Take Off) from the truck engine to drive a milk pick-up pump, so consequently they are idling for a very significant amount of time (approx 30%) even so we are achieving a diesel replacement factor (DRF) of approximately 70% with LNG”. In 2005 our studies showed a AU$0.17/km saving across the 25 operational vehicles, this represented around AU$850,000.00 saved over the year, giving a payback of a little over 1.5 years. Current figures indicate that the savings per km can reach up to AU$0.27/km on some applications and AU$1,400,000 saving in diesel costs in 2008.

LNG and Dual-Fuel™ technology is now well established at MGC. The initial introduction was a very different experience for MGC at first. “It was new, rough, technology, but can, and does continue to deliver the Greenhouse and economic benefits for the company. Our people had a passion for the technology and it was these people who made the difference”.

With improvements to LNG quality and availability, as well as Dual-Fuel™ technology we continue to build our LNG fleet across our 8 locations in Victoria and Tasmania.

Bernie Cornell, Group Transport Manager MGC, May 2009

Sands Fridge Lines

September 9, 2009

Sands Fridge Lines was the first company to trial a Clean Air Power C-12 LNG Dual-Fuel™ system in 2002 and the vehicle is still in use today with over 1.2 million kilometres travelled. The success of the LNG story within Sands Fridge Lines is a reflection of Kevin’s Sands attention to detail and understanding of the technology.

Kevin Sands is a director of the family owned business, now run by the 3 sons, and is responsible for the operations side of the business. Kevin is a true pioneer of the LNG story for heavy duty vehicles in Australia.

"Clean Air Power have been testing the latest level Hawk® C-15 Dual-Fuel™ system in an on-highway application in Western Australia since March 2009 and as the operator of the vehicle, l have been impressed with the fuel consumption, substitution, and driveability/performance.

The vehicle is hauling both a single trailer (60% of runs) and road train configurations (40% of runs) between Perth and the South Australian border. The vehicle has completed approximately 180,000kms of development and commercial runs to date.

Compared with the Eagle C-15 Dual-Fuel™ system, the Hawk® system shows improved drivability and has achieved outstanding driver acceptance. Much of this improvement is due to the alignment of the Torque and Power curves to the base diesel engine. Drivers find the vehicle exceeds their expectations of a diesel engine in the same application and enjoy the fact that they do not need to “learn” how to drive the Dual-Fuel™ vehicle as they did with the Eagle. The only negative feedback about the test runs is the lack of availability of LNG near the South Australian border which requires the driver to complete approximately 400kms of the run on Diesel only. I have recently taken delivery of my second C-15 Hawk® system which is already in commercial use".

The AFCP program successfully delivered on a range of improvements to the C-15 Eagle system that improved robustness and driveability. All stakeholders were satisfied that the program had delivered its goals, with happy customers behind the wheel once again.

Robert Wiseman Dairies

August 16, 2007

Robert Wiseman Dairies is now operating 22 Liquefied Natural Gas (LNG) Dual-Fuel™ DAF CF85 340 4x2 tractor units on trunking routes in the north west of England and Scotland.

All Wiseman Dairies trucks and tri-axle milk trailer combinations operate at 38 tonnes GVW and will cover around 100,000 miles per annum. The trucks operate from 2 depots, 10 from Bellshill, and 12 from Droitwich, with a LNG refueler on both sites, and gas/diesel usage is monitored via a Triscan fuel management system.

Robert Wiseman Dairies, one of the UK's leading fresh liquid milk processors, has been delighted with the truck's performance and more importantly the drivers have really taken to them.

"Clean Air Power’s Dual-Fuel™ installation gives us the best of both worlds – lower emissions and fuel costs. If there is an issue with gas supply the Dual-Fuel™ system seamlessly switches to diesel, giving us maximum reliability," explained John Kirk, group transport manager at Robert Wiseman Dairies.

Drivers like the reduction in engine noise during motorway driving as the trucks are predominantly using natural gas, not diesel.

Mitchell Corporation

February 2, 2007

Mitchell's dual fuel heavy duty commercial vehicleMitchell Corporation currently operate 96 Dual-Fuel™ vehicles, after successfully trialing for 18 months 14 Dual-Fuel™ trucks, meeting all operational objectives and generating annual fuel savings in the region of up to £40,000 per truck. As a result, 70 Dual-Fuel™ installations were ordered from the original contract, with an extra 12 Dual-Fuel™ installations (now completed and in operation in Western Australia at depots located in Kewdale, Geraldton, Kalgoorlie and Cue) taking the total Mitchell fleet to 96 vehicles.

Mitchell Corporation is a transport company based on the west coast of Australia and their fleet of Roadtrains (multi trailer vehicles running at over 100t gross vehicle weight) transport a mix of fuel, dairy and mining goods up and down the west coast.

Clean Air Power's unique Dual-Fuel™ application runs on clean Liquid Natural Gas (LNG) which can reduce annual carbon emissions (CO2) for a truck in this type of operating environment of approximately 37 tonnes with natural gas being considerably cheaper in Australia than diesel. If the engine's gas supply should be interrupted for any reason, the engine seamlessly switches over to diesel without any loss of power.

Clean Air Power is working with Caterpillar dealers William Adams in Melbourne and Westrac in Perth to further build its Dual-Fuel™ presence in the Australian market.

Warburtons Family Bakers

April 6, 2009

Wharburtons Family Bakery commercial vehicle operating on Dual-Fuel™ natural gasWarburtons Family Bakers have 18 Foden Alpha 385 HP 4x2 tractor vehicles and 2 DAF CF85 430HP 4x2 tractor vehicles. They also have 14 ERF 380HP 4x2 tractor vehicles on dedicated gas operation and 6 DAF 18ton 4x2 rigid dedicated gas vehicles.


Wharburtons Family Bakery commercial vehicle operating on Dual-Fuel™ natural gas. All the vehicles are CNG containment and are filled utilising their own compressor on site at their Bakery in Bolton Lancs. This is a unique operation because they also operate their baking ovens on natural gas at the same site.


This operation has stood the test of time as they have been using Dual-Fuel™ vehicles since 2002.

Harris Farms Inc

March 8, 2007

Harris Farms Dual-Fuel™ commercial vehicle. Harris Farms Inc operate over 20 vehicles running on a combination of diesel and natural gas, and has clocked up well in excess of 10 million miles and is now looking to expand its Dual-Fuel™ fleet.

Harris Farms Inc, a leading Agribusiness in the United States, has been working with Clean Air Power for many years since it adopted its Dual-Fuel™ technology in 1999.

They have invested in a dedicated fuelling station and training for their staff to ensure a successful programme and a realisation of the benefits of the technology.

Analysis undertaken by Harris Farms Inc showed that by using LNG in place of diesel, savings of $17,000 per truck per year could be realised - this equals a potential of over $370K savings per year for the entire fleet.

In addition to significant reductions in operating costs, Harris Farms has stated an increased choice in fuels, reduced emissions and reduced dependence on foreign petroleum as clear benefits of working with Clean Air Power.

United Utilities

April 6, 2009

United Utilities operating a Clean Air Power Dual-Fuel™ natural gas commercial truckUnited Utilities operate 1 vehicle, a Clean Air Power Genesis Mercedes Axor 6x2 Tractor unit at 440HP from their Waste Treatment Plant at Davyhulme, near Manchester.

United Utilities filling a Clean Air Power Dual-Fuel™ natural gas commercial truck with CNGThis vehicle has CNG containment and is being operated as part of an initial trial to assess the feasibility of operating the remainder of their vehicle fleet on Biomethane, produced at the site, from the Waste retreatment.

Wheatons Transport

April 6, 2009

Wheatons Transport operating a Clean Air Power converted Dual-Fuel™ commercial vehicle Wheatons Transport operate 1 vehicle, a Clean Air Power Genesis Mercedes Axor 6x2 tractor unit at 440HP from their Chard depot in Somerset.

They have a fleet of Mercedes vehicles, 12 in total, and have ambitions to operate their transport fleet on Biomethane produced from their own anaerobic digester on site.

This vehicle has LNG containment and currently uses the Chive Aust station for re-fuelling.