Plsntrules: Much added friction since your engine never warms up. Becasue of your short trips with a cold engine, you should have changed your oil at your 6 month/5000 service to use 0w20 synthetic oil as your owner's manual recommends for best mileage (not the 5w20 alternative). Note: the manual is silent on the word synthetic but there is "dino" 0w20. Yours is one of the few cases where synthetic oil can produce better mileage.
Take a 100 mile intersate highway trip not exceeding 70 mpg in spring type weather and carefully measure your gas mileage - fill it up at the same pump both times. If you don't get well over 30 mpg; its the car and something is wrong and you should bug the dealer.
I drive the 268 Horesepower V6 which gets a couple miles less (in theory) in city driving but its all over the internet, the V6 gets MUCH better highway mileage. I get 36 mpg on the Interstate; 30 mpg 50/50 highway/city. My WORST tank since I've had the car was 26mpg when I did more city than highway drive. I usually go about 400 miles between fill-ups and the fuel light has never come on.
Last edited by Paul3637; 03-23-2009 at 08:49 PM.
Reason: correct spelling errors