Saving Gas.

I get an easy 270+ per tank and I drive it spirited. A lot of my use is city as well. I definately think you either need a tune-up or need to back off the gas a bit. Try letting your car shift a bit lower.
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But, I know when I drive from here in Orlando to Atlanta, its just over 500 miles and I can make it on barely over 1 tank of gas doing 90mph, 2000 RPMs and t-tops off.

Our cars are just idiot proof. GM figured if they told us our car was empty when we still had 2 - 2.5 gallons left we would never run out of gas

Really I think it might have something to do with keeping the fuel pump cooled in the proper amount of gas so it does not burn out any more often than they already do.
If you run it low enough you will see. Your manual will tell you its 15.5 also. I've gotten it low enough to get 14.2 or something in it.



