Reviewed by brian d (EPSOM, NH) — May 03, 2013 7:33 PM

THE UNIT A PEASE OF CAKE TO INSTALL IT CAME WITH TOOL TO DISSCONECT FUEL LINE FROM FUEL RAIL WELL MADE QUITE PRICEY .DOES MAKE JEEP RUN SMOOTHER .DONT KNOW ABOUT M P G NOT A DAILY RUNNER . I DONT KNOW HOW IT WORKS IN SIDE OF THE UNIT .JEEP HAS 144000 MI AND PERRS LIKE NEW.

Reviewed by Conrad B (KITTERY, ME) Reviewed for a 2007 Dodge Ram — Feb 19, 2013 6:14 PM

This is an awesome product, it was very easy to install. I noticed better gas mileage right after I installed it. I will recommend this product.

Reviewed by Reymond K (SALEM, OR) Reviewed for a 2012 Hyundai Genesis — Sep 06, 2012 8:31 AM

Been using these for years; and have had good results with every auto application. What changes is the ability to use regular gas in a high compression motor (11:1)with no measurable timeing roll back and no detonation. Regular gas has a bit more energy, and this is reflected in better gas mileage. Suggest anyone considering this product first research John Fitch on Wikipedia, and then go to the Fitch site.

Reviewed by Thom F (Rockford, IL) Reviewed for a 2007 Mazda Miata/MX-5 — Apr 18, 2012 4:18 PM

Have used for years. Mileage increases with use. MX5's have problem with pre-detonation. Never happens with Fitch treated fuel. I even ran 87 octane with no "Ping". With no pinging, cam and ignition timing stay advanced improving performance.

Reviewed by Kelly Y (Readfield, ME) Reviewed for a 1998 Dodge Ram — Apr 11, 2012 6:49 AM

I am a long time and firm believer in Fitch. Been using the pellet type for years now. Read all the hype and one day just decided to order some and try it for myself. It works so well I have hundreds and hundreds of dollars of these things in use right now in all manner of fossil fuel burning items, although this is the first time I've ever ordered this canister type for a vehicle. I don't look at Fitch as a mileage thing. To me, it's simply a "best fuel you can possibly burn" kind of thing. I'm sure there's some extra mileage in there somewhere, but what I like is looking at the exhaust of all my stuff (lawn mowers, generator, snowmobiles, kerosene heaters, weed whackers, my truck, etc.) and seeing CLEAN mufflers and CLEAN burning kerosene heaters and CLEAN tailpipes, as well as CLEAN carbs and CLEAN fuel injectors. Was talking with a good friend of mine a few years back about Fitch. I took him into my garage and showed him the business end of my kerosene space heater (the kind that looks like a jet engine). His exact words upon seeing my totally clean kerosene heater that I use as my sole source of heat in the garage during the winter was, and I quote, "Holy sh**!" :) Needless to say the man is a Fitch man, today. :) If the fuel is burning so much cleaner with Fitch than without it you just know you're squeezing every ounce of energy from whatever it is you're burning. :)

Reviewed by Timothy D (North Chesterfield, VA) Reviewed for a 2008 Cadillac Escalade — Mar 19, 2012 9:30 PM

This product is awesome. With gas prices over $4 in Virginia. I am exstatic over the ability to run regular unleaded and tune my truck to the tune of 24 mpg in a 6000lb beast!! My wife still cant believe it. Keep up the good work. All of my vehicles including my motorcycle will get one of tgese bad boys!!!

Reviewed by Michael B (Barstow, CA) — Oct 29, 2011 6:07 PM

I ordered the Fitch Fuel Catalyst for my '06 Cadillac CTS-V. Having a slightly modded, 400+HP V-8 as a daily driver is fun but can be a bit taxing on the wallet. I therefore looked into using the Fitch Fuel Catalyst to help make the 78 mile daily round trip a little less costly. While I've not noticed any large improvement in overall mileage, what I have noticed is I can use regular unleaded vs. the premium I've always had to use for my 10.9:1 compression ratio without losing any mileage or power. THAT is very important to me. Plus, I don't have to worry about putting in an off brand fuel anymore. The price alone is worth that peace of mind.

Reviewed by Edwards Z (Concord, CA) — Oct 11, 2011 8:37 AM

I unfortunately am required to undergo the biannual CA smog check program. I use this vehicle very infrequently therefore I do not know how much it is helping. My shop which did the installation was very impressed with the quality of the components and that it has the C.A.R.B. registration.

Reviewed by Jacob S (Clackamas, OR) Reviewed for a 2010 Chevy Camaro — Aug 17, 2011 12:12 PM

I noticed a small change in performance and maybe 1mpg difference. It's kind of big and the only place I could find to mount it without drilling was right above the radiator. Obviously not the best place to put it since it is suppose to be in a cool spot

Reviewed by Cristian S (Coral Springs, FL) Reviewed for a 2010 Nissan Armada — Jun 11, 2011 5:00 PM

I been looking for ways to save on fuel. This beast love to eat so had I had to put him on a diet. The Fitch Fuel Catalyst worked, I gave it a week to see how much fuel I was saving and I am averaging between 2 to 3 mpg. I installed it in the engine compartment driver's side radiator cover. You will need a special tool to remove the fuel clip and once your remove that, I just had to remove one screw on the top right side of the radiator and replaced it with a longer screw. Total install took about 25 min.