I'm impressed with your gas mileage. I going to check into the cold air intake and mass airflow sensor. Do these parts effect the warranty? I have a 2009 (bought new) that I'm using 85 Ethanol. I just bought a 2011 Malibu LT which is another great Chevy. I asked the salesman if the HHR is going away and he old me no. I think my HHR is a great car. ... Read More
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