I have the following numbers to report on my fuel MPG thus far. With 3906.8 miles driven and 237.612 Gallons of Diesel used i have a overall MPG of 16.44 with a high of 19.33 and a low of 13.73

non towing miles pre Smarty Jr are 6506.4 with 385.563 Gallons used for a MPG of 16.88 with a high of 19.12 and a low of 12.92

i have been running on the 40 hp level all this time
i think winter fuel is the culprit since i installed the smarty Jr on Dec. 13th but cant be sure

i have almost 37K on the clock
how does this compare to others

i do really like this product as a side note really helps driveability and performance

 

People have reported that the 100HP setting will produce better mileage than the 40HP tune will.

Shawn

 

[QUOTE=xtoyz17;2355935]People have reported that the 100HP setting will produce better mileage than the 40HP tune will.

Thats probably right, cause I saw better hand calculated mileage on the 70hp setting than the 40hp setting. I havent tried the 100hp setting yet...dont want to hurt the auto