Stay off the gas pedal! Filled my 05 Hemi Daytona up on the way home from work the other day and reset the mpg meter on the overhead computer. The road home is a 2 lane backroad through the pine barrons on NJ, 55 mph speedlimit, so I just cruised at that speed and stayed light on the gas. At one point the computer was reading over 23 mpg's, settled down to about 22 mpg's, then I hit the light where I needed to make a left turn onto rt 72 east and watched the mpg's tank as I sat there idleing at the red light. By the time I got home after going through town, I was still above 20mpg's, I think it was actually 21.3 or so, but, then driving around town killed it, back down to 16-17mpg's overall. I was very pleased with the slow cruising 55mph mpg's though. My truck is new to me, got it about a month ago, so it is stock, and I'm not sure yet if it needs any filters, fluid changes or spark plugs, taking it to my friends shop this Friday to do some maintenance and also see if we can figure out why the CEL came on twice a few weeks ago, with 2 different codes. The CEL has not come on since, so we suspect a coil pack or wire since the CEL came on while I was driving in the rain. It hasn't rained since that day and the CEL hasn't come on either after we reset the light. Got the onboard co-pilot pludded into the maintenance port, waiting to capture the CEL.