I get anywhere between 9 to 13 mpg and it doesn't seem to mater weather its hwy or city driving. I have a superchip 1705. I usualy have a pretty light foot.
One more question has any one had a problem with power? Mine sometime will have really good power and about 18 mpg, but most of the time it seems really doggy. When I was having good power I thought it my be where I was getting fuel but that was not the case because I never got the power back.
Does anyone have ideas what could be the cause? The truck has alway seemed to have this problem