Fitch Fuel Catalyst

What is this thing? Well, it’s a device you drop into the gas tank, and in the words of the manufacturer:

“The Fitch® Fuel Catalyst improves the combustibility of hydrocarbon fuels by treating the fuel immediately before it enters the combustion chamber. As the fuel is exposed to The Fitch® Fuel Catalyst in the fuel tank of small engines or as it passes through a canister containing the catalyst in the fuel line of larger engines, the catalyst acts on the naturally degraded extreme ends of the fuel spectrum. Most fuel is made up of high energy constituents which burn with a fairly high degree of efficiency. However, there are others which tend to cause problems during the combustion process. The lighter components burn too fast at the beginning of the combustion process causing pre-ignition and the heavier ones burn too slowly at the end of the process causing both excessive smoke and carbon buildup. The Fitch® Fuel Catalyst acts on both of these problem fuel components insuring that they burn with the same efficiency as the rest of the fuel. As a result, fuel burns cleaner and more completely in an improved combustion process.”

“By facilitating more complete combustion, the Fitch® Fuel Catalyst improves fuel economy and increases power, while reducing emissions. The use of the Fitch® Fuel Catalyst also results in cleaner engine oil, reduced carbon buildup in the engine, easier starting, reduced maintenance, and prolonged engine life.”

Now I’m no chemical engineer, so I can’t comment on whether the theory behind this thing is sound or not. But that “increases power” claim (which is backed up by dyno results on their web site) caught my eye, and I do know how to run a dyno. So let’s cut to the chase and see if I can substantiate at least that claim.

To make the comparison fair, I bought five gallons of hi-test at a local station and put it into 2 gas cans, one with the Fitch device and one without. To give the device ample opportunity to do it’s magic, I waited a couple days. The mule (my Buell S1) was flushed of all old gasoline and the un-Fitched fuel was put in. After a thorough warm-up, dyno testing commenced. The bike was tuned up, and once a solid, repeatable result was obtained, all of the gasoline was drained out and the Fitch equipped gasoline poured in, along with the Fitch device. Testing resumed, and after about an hour of pounding on the S1, trying my damndest to find some justification for the $50 I had parted with, I gave up.


Not only were the “best” pulls in each configuration (shown) virtually identical, but more importantly, the range of results between the treated and untreated gasoline was well within the repeatability of the measurement.

Bottom line, while I can’t comment on all of the claims made by the folks at Fitch, I can say that with this bike on this day I couldn’t detect one iota of difference in the power with or without the Fitch device.


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