Got a tazer for my 392 for a few specific reasons; remote window down/up, nav operation while moving, weather alert off, line lock, and track and eco modes enabled. Had a chance to do city driving with little traffic to work, mostly 30mph, a few stretches of 35. Kept the engine idling at traffic lights, and kept up with traffic when there was some. Took it easy, and only measured 9miles of driving, but there were about 30 (didn’t count) traffic lights involved Result? 25 mpg city! No kidding, I’m impressed how much it kept me in 4cyl mode. Worth every penny just for eco. 25 thumbs up!