you refuse to buy something with less than 24.5 ... Cobalt maybe?
seriously i have a grand marquis i can get over 25 with or i can get under 20 it's all about the driver in most cases.
if your THAT worried about fuel economy you can buy a smart car for under 20K.
I Promise you my camaro won't get over 20 the first few tanks.... hearing that exhaust note feeling the power... probabally closer to 10
With the manual trans you should easily be able to get this with good driving technique.
__________________
2001 Corvette
Heads,Big cam, 4:11, Custom Exhaust, MGW Shifter Baer Eradispeed +2 2 pieces rotors, Hotchkiss swaybars. and a few other little things.
1998 Trans Am A4 ( was STS turbo until the turbo and oil pump died)
2000 WS6 Trans AM under the knife ( sadly turned into long term project.