[gchemist]

I just averaged actually recoreded 15000+ miles on my ZZ4. I've documented the miles since breaking in the ZZ4 on a 1000 mile trip. Average total with city, highway and lead foot = 16.5 MPG. Lowest at 11 MPG, yea really lead foot. Highest 25 MPG, wow great back wind lower speed! Average now is 13.5-15 if I keep my foot out of in the city. 18.5 MPG on straight highway speeds of 70 MPH. Not bad for a square body. The difference is torque. The sweet spot for a 305 is ~2000-2200 RPMs at highway speeds. Keep it there and you'll do great. Keep city RPMs below 2300.