changingtime wrote:
Stout Dog, how in the world are you getting 29 miles per gallon. i seem to be averaging 23...the last owner (1 owner before me) had a boost box - which was killing the mileage - I took it off and now up to at least 23 miles.
My sig has all of my modifications. Most important: GDE Tune, Magnaflow muffler, Amsoil air filter, and clean MAP/hoses. I'll soon be adding a 192* tstat and TCM tune, both of which should improve my mpg even more.
Add to that lots of highway driving and cruising at 60-62mph around Phoenix (speed limit of 65)... On the highway, I generally just do whatever the speed limit is, as the time saved outweighs the cost of diesel. For example, driving 75 instead of 62 costs about $1 of fuel for every 15 minutes saved. Also, I keep my RPMs at or below 2000 when accelerating from a light, which keeps me right with traffic, and I coast/time traffic lights whenever it is possible and safe to do so.
My mpg is probably going to drop some, however, as I'm now considering switching over to B99 completely, which lowers my mpg about 10%. This oil spill, which looks like it is about to devastate my native North Florida, is motivating me to spend the extra $$$ (about $8/tank) and get off the drink completely

We will see....