 I test drove the Tacoma before trying out the Frontier.  I had no intention of purchasing a four banger, but after giving both the Tacoma and Frontier 4 cyls a shot, I wasn't let down at all.  I like both trucks, but I picked up the Frontier for a couple of thousand less than a comparable Tacoma.  Currently averaging 22+ MPG with mixed city/hiway driving and a lot of up and down RPM fluctuation while it is still in the break-in period.       