Steps to remove radiator from 2009 chevrolet Malibu

SOURCE: poor fuel mileage and power 2009 chevrolet malibu

Your numbers aren't that far off...the mpg posted is established using professional drivers...I could likely coax a few more mpg out of your car if I drove it because I know how. Generally, today's new engines do not need any "break in" so it should have adequate power right out of the box! There may not be any updates for the computer, but the map sensor should be able to compensate for altitude changes. Using a synthetic oil can help a bit as well.
I'd try and find out if there were any optional transmission or final drive gear options offered for different localities. That may affect both mpg and performance. As for shifting, (as well as everything else you mentioned, I'd definitely contact factory customer service if you aren't getting anywhere with your dealer) The car didn't cost $5.00, and therefore I would take it to the "next level" if you aren't happy with it!!

SOURCE: how to reset oil gage on a 2009 Chevrolet Malibu thank you richard

you mean the oil life richard if so hold the info and enter button on steering wheel at same time oil life will come up then release hit enter again and it resets,good luck, mike