So far I have five fill-ups in my '10.... CALCULATED MPG / TRIP COMPUTER MPG / DEVIATION 18.5 / 18.5 / 0.0 16.2 / 16.7 / 0.5 18.0 / 18.0 / 0.0 16.5 / 16.1 / (0.4) 18.4 / 18.4 / 0.0 For the first 5 fill-ups (I don't count the initial fill-up since I don't trust the dealer to have properly...

I have a line on an 2011 RTL with 62K miles to replace my 06 RTS. It was a fleet vehicle which worries me a bit. Of more concern, I noted the milage calculator on the dash was reporting about 5-7MPG. Is this the reset value after changing the battery or does it indicate some messing around...