Quote:
Originally Posted by JFR1
Thanks all for the input and advice. Seems that my mpg at 19 is about what others are getting. Just cant understand the drop.
Does anyone know if the factory 'tune' is different for a 1LS auto vs a 2LT auto? I may just get Ted at Jannety racing to re-tune the computer. Thanks.
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I'm pretty sure the tunes are the same. Like CamaroDreams07 pointed out, the difference in overall diameter of the wheels is only 0.1 inch, so that will have almost no affect on the speedomter calibration. It is mostly like what Scrming suggested -- colder weather means worse MPG. Mine has gone down about 1 MPG around town. If they only put ethanol in your gas during the winter, then that may explain why you saw a bigger drop (we have it year around here). Also, I don't discount that you may be driving a little more aggresively because these cars love the cold weather.
