I tried the extended cab with a 4 cylinder and five speed. I found it to be very quiet, surpisingly torquey as well. If that is what 20/27 mpg feels like in a truck, I could deal with that. In fact, I specifically decided to try the four cylinder truck to see what it had on the Toyota Tacoma after reading columns here about Toyota's bragging about their fuel economy. I figure that the Colorado in that configuration would give the similar Tacoma a drive-by b-slap.