My 5.8 liter gets about 14 on a good day

 

I just wrote some info on this stuff in the engine section. I got a 99 5.4L i was getting around 14-15 city highway. I motor koted my truck i gained around 3-4 mpg. Not bad for a few additives that keeps on working. I did the fuel treatment a few times one bottle will do around 140 gal i think. I put motor kote in my oil when i did a oil change then i added it to my front and rear differentials. For more info read my thread i posted.

 

2005 SC, 5.4L, @8,500 miles, averages 16.6 mpg about 80% freeway/20% heavy city traffic. On the freeway I'm usually running 80 - 85. I tow 3,600lb from time to time but it seems to have a minimal impact o the mpg.

 

Be honest, man. I've found that additives like this one are largely snake oil (no pun intended). How many tanks of gas have you averaged 18+ MPG and what kind of driving are you talking about?

 

My 97 5.4L gets about 12-13 MPG and thats all.