just wondering if anyone has used a fitch fuel catalyst on their 5.4 just thinking of buying one but was wondering if id notice anything ive heard good things about them but also heard that results very with diferent vehicles

 

On a stock truck except exhaust I ran ten tanks and avg. 12.0397 mpg in town. Then I put this on and went to 13.5402 mpg over 17 tanks. Then I got a superchip and put it on economy mode and went to 15.341 mpg over 4 tanks. I record every tank when I fill up and my driving has stayed the same. I just now added shorty headers, and will update on what gains I get with that, I know I got 10 hp with those. Back to the fitch, that is 1.5 mpg pickup at $190 I figured on my truck 15,000 miles to pay for itself.