[5speed5]

It's a 2005 Chevy Colorado 4WD with 3.5L 5-cyl engine and 5-speed manual tranny. 29.26 mpg followed by 29.40 mpg. Not bad, but I was hoping to break 30. My only mods so far are tires at 40 psi and smooth hubcaps and I used EOC for both tanks. (Used it sporadically prior to that.) EOC doesn't work as well for this truck as it did for my previous vehicle (Pontiac Vibe, 47+ mpg...never tried EOC on my Metros). This truck coasts like a pig! The driveline is just not as loose as a car's (it's got over 80K miles and should be "worn in" by now).

It took a long time to get through two tanks as I drove my Trailblazer most of the summer (because I had to take kids to camp everyday). It took 2 mos & 6 days to go the 538.9 miles of this tank and a little under 1.5 mos for the previous tank of 540.7 miles.

Next mods are electric cooling fans (currently has mechanical clutch fan) and a tonneau cover (probably homemade)...not necessarily in that order. Hoping to break 32 or even 33 mpg with those mods next summer.

Edit: Made it over 30 mpg see 9-24-10 entry below