The Fitch® Fuel Catalyst reformulates gasoline, diesel, fuel oil, propane and natural gas causing the reformulated fuels to produce more energy during combustion than these fuels otherwise would. It is a true catalyst which by definition causes one or more chemical reactions but does not participate in them. Because it doesn't participate in the reaction, unlike additives, it is not consumed in the reaction and thus lasts for years after initial installation. The Fitch Fuel Catalyst also has no moving parts and is thus maintenance free.

Fitch Technology, under European Community (EC) regulations, is certified for significantly reducing fuel consumption and harmful emissions.

Because the Fitch Fuel Catalyst causes more complete combustion it also reduces pollution and toxic emissions in the form of greenhouse gases, polyaromatic hydrocarbons, particulates and soot. When combustion is complete and 100% of the potential energy is extracted from the fuel the byproducts of combustion are carbon dioxide (CO2), water (H2O) and nitrogen (N). Toxic emissions such as greenhouse gases are a byproduct of incomplete combustion. Because the Fitch Fuel Catalyst causes more complete combustion these toxic emissions are reduced substantially.  Maintenance costs and unscheduled downtime are also significantly reduced because of reduced carbon build up.

Using Dart Mass spectrometry Dr. Steven Suib and members of the Suib Research Group at the University of Connecticut were able to identify four positive molecular changes  the Fitch Fuel Catalyst induced in treated fuels. This research was, in part, funded by a grant from the United States Department of Energy.  

The Fitch technology has been validated numerous times including by a University Laboratory, a number of independent engineering test facilities using ASTM test protocols, a number of independent performance testing facilities, a number of publications and by our customers. Below is a small sample of the validations.  


Validation by the Suib Institute at the University of Connecticut

Using Dart Mass spectrometry Dr. Steven Suib and members of the Suib Research Group at the University of Connecticut were able to identify four positive molecular changes  the Fitch Fuel Catalyst induced in treated fuels. This research was, in part, funded by a grant from the United States Department of Energy.

In simple terms this is how the Fitch Fuel Catalyst works.

Validation by independent Performance Testing Facilities

A number of independent performance testing centers have tested the positive impact of the Fitch Fuel Catalyst on gasoline, diesel fuel and fuel oil. They have reported positive improvements in both performance and emissions.


Reduced emissions and improved fuel economy

Increase in horsepower and torque

Reduced Emissions

Improved Fuel Economy

Diesel Fuel

Improved Fuel Efficiency, Reduced Emissions or Greater Horsepower and Torque

Suppression of bacterial growth

Fuel Oil

Improved fuel economy and performance

Improved fuel economy


Validation by Independent Engineering Firms


Diesel Fuel


Validation by Independent Publications

Automotive Publications

4 Wheel Drive SUV

"With the device in place these numbers made a noticeable jump with an average of 9.6 mpg. The extra pep that was detected felt like we had added an octane booster at the last fuel fill up, and it will continue to perform in this manner without the need for replenishing. If you’re after improved fuel economy, reduced emissions, and improved performance then the Fitch Fuel Catalyst can deliver."  Read more

5.0 Mustang & super fords

"The Fitch Fuel Catalyst could prove itself a good addition to a hopped-up 'Stang when lower-octane fuels are used.  Increased fuel mileage without a negative impact on horsepower is one of the greatest best-of-both-worlds there is for a true performance enthusiast." Read more

Chevy Hi-Performance

"The Fitch Fuel Catalyst is a simple inline fuel system bolt-on.  This translates to a higher grade of quality, which means better fuel economy and increased power.  Plus, the catalyst is maintenance-free and comes with at 250,000 mile warrantee!" Read more

diesel power magazine

"If you're looking for a way to increase your fuel mileage, you might want to check out the Fitch Fuel Catalyst. At about $300, it isn't a bad way to fight high fuel prices." Read more

diesel power 


"We noticed an approximate - 2 mpg increase over stock with the Fitch system." Read more

Sport Truck  

"We were also skeptical to the claims that we would improve our fuel economy by as little as 1.5 to 2 mpg, but to our surprise, we ended up getting a 2.5 mpg improvement." Read more


Recreational Vehicle Publications


"Tom Johnson recently dyno tested the Fitch Fuel Catalyst (FFC) on a 1994 Ultra Classic using a DynoJet 150 kindly provided by S & S Cycles, Inc. Below are some of the quotes from his 6 page article which IronWorks featured on its cover. 

The test "showed an increase of 1.4 hp/1.2 ft peak power (6200 rpm) with a gain of almost 3.5 hp at 5500 rpm." "In an engine that has been optimized through careful tuning, gaining three horsepower, even two horsepower, is big news, cause for celebration"  

Further, the graphs showed that the engine was reaching some horsepower and torque figures as much as 500rpm sooner with the catalyst than without it. For me that translates to 'faster quicker'." 

"Still not convinced that I was convinced? Back home after the dyno test I immediately lined up FFC's for my knucklehead stroker and '40 Ford hot rod."


"We have been using the Fitch Fuel Catalyst in most every gasoline powered engine we own. We continue to experience nothing but fresh fuel and an elimination of fuel related problems with all of our seasonal equipment. Year after year, no green crap, no varnish, no gum, and the gas acts like it is still premium grade. Even after six months the fuel does not go stale, it actually seems to get better. Think of the Fitch as a 'Fuel Sentry' bacteria inhibitor, octane booster, and fuel stabilizer all in one."  Read more


"We have tried the Fitch Fuel Catalyst many times and it really makes a difference. The Fitch Fuel Catalyst cured a hot weather detonation problem on our Buell Cyclone. Throttle response is more crisp. Fuel economy went from 120mpt (miles per 4gal tank) to 137mpt. 4+ more miles per gallon or over 10% more miles per dollar.” Read more


"Fitch Fuel Catalyst is a product that really works as claimed" Read more

Four Wheeler magazine

"[The Fitch Fuel Catalyst] did see notable gains of 1.37 mpg over 4,383 miles." Read more


Commercial Trucking, Heavy Duty Equipment and Marine PUBLICATIONS

Civil Infrastructure

“The Fitch Fuel Catalyst can reduce fuel consumption, lower maintenance hours and save many quarts of lubricants. In tests done with both vehicles (in both a laboratory and field) fuel efficiency has improved by anything from 5% to 12%.” Read more

Bus Exchange

"Another great product for cleaning up the dirty fuel that plagues the transportation industry is the Fitch Fuel Catalyst” Read more

RV West

“The Fitch Fuel Catalyst came through with flying colors” "RV was getting 4.2 kilometers per litre-afterwords recorded 5.39 kilometers per litre” Read more

SOUTHERN boating

"There is no question as to the catalyst's ability to meet these claims" Read more

power and motor yachting

"... on our 43 ft Fairline with twin Volvo Penta 73Ps'the Fitch Fuel Catalyst (Walker FuelSeP) reduced soot on our transom. This is a solution to transom soot worth considering. It sure cleaned up our act" 


Heating and Industrial Processing Publications

real estate weekly

"Consulting engineers, Walter T. Gorman PE, PC reviewed the product and recommended that it be “incorporated into your buildings energy and emissions reduction plans.”

“The technology rejuvenates and preserves fuel in storage or just prior to use insuring premium fuel quality and optimum combustion and energy yield,” writes Gorman. “The results are increases in fuel economy, fuel quality, and heat output as well as reductions in emissions and equipment maintenance.”

Jeffrey Gural, the chairman of Newmark Grubb Knight Frank, gave the converter a test run on a sample of the firm’s properties during the winter of 2011 and after a successful trial, made plans to outfit all of the firm’s oil-heated properties by 2014.

Already approved by the New York City Building Department and currently installed in over 900 properties throughout the city, the converters are expected to deliver a 7 percent reduction in fuel usage per year." Read more

oil and energy

“Device Improves Fuel Economy By Changing Fuel’s Structure” Read more