I recently installed a power puck and I really enjoy the way the truck performs now. The one thing I did notice is that my mileage has increased by about 1.5 mpg. I installed a set of BFG 285's about two months ago and my mileage dropped from about 18 to a constant 16.5 and now it's back to 18. has anyone else noticed this? If so, any thoughts on why?

 

I ran a puck for a while and my overhead showed a 4mpg increase while it had actually stayed the same or dropped a little when I hand calc'd it.....