I have been driving my newly resurrected 3.8L, 3 speed auto convertible to and from work for 3 weeks now and have calculated an MPG of exactly 15 MPG after going through 3 tanks of fuel. I do not drive it particularly hard and I keep the top and windows up. It runs at a steady 2,300 RPM at 65Mph. I drive a combination of city and highway of about 40% and 60% respectively. Can anyone else post their MPG? I am also interested in hearing from those with stock I6 and 4 cyl motors. As far as mods, I haven't made any. Once this week ends I plan to pull some plugs and check their condition. Any suggestions on how to increase this MPG figure? Thanks!
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