OK, so I initially posted on here about my disappointment in my fuel economy to start with, and that led to a lot of discussion... of which most of it had nothing to do with fuel economy after a few posts.
What I've done here is let the data speak for itself. I've tracked every tank I've had in the car since purchase. I purchased the car on 4/9/11 and my first fill up was 4/12/11. I've pulled the data from 4/12/11 to 4/7/12 off my Fuelly account, and summarized here below.
First, information on my "normal" driving. I commute approx. 75 miles each way, and purchased the car for use in a carpool. I changed my carpool habits in September of 2011, so April to September of 2011 the primary use was my work commute, but of course there were other trips in the car. From September 2011 (mid month) to now my commute in my car has been shortened, but still along the same original route. I now meet up with others and swap into a different car. I have also marked out when "significant" events happened (tire pressure change, first oil change, 93 octane use for Trifecta Tune, and K&N CAI install) so that you can be informed when looking at the data.
Once I had the data, I charted by mileage (as dates of fill up had no meaning to the car), as some feel that the engine "breaks in" and this would allow to see that effect (if any). I then grouped the data by quarter of the year (1st Qtr. Jan - Mar, etc.) so it could be associated with "seasons". I color coded these groupings as marked them (blue for winter, green for spring, red for summer, orange for fall) on the chart. And, I've broken down Max/Min/Avg/St. Dev by season, and listed it for overall.
I can't think of any other meaningful ways to display the data... but could break it up differently if so compelled to do so. With all that said, I see the best fuel economy in the summer (go figure) and worst in the winter (again, duh).
What I've done here is let the data speak for itself. I've tracked every tank I've had in the car since purchase. I purchased the car on 4/9/11 and my first fill up was 4/12/11. I've pulled the data from 4/12/11 to 4/7/12 off my Fuelly account, and summarized here below.
First, information on my "normal" driving. I commute approx. 75 miles each way, and purchased the car for use in a carpool. I changed my carpool habits in September of 2011, so April to September of 2011 the primary use was my work commute, but of course there were other trips in the car. From September 2011 (mid month) to now my commute in my car has been shortened, but still along the same original route. I now meet up with others and swap into a different car. I have also marked out when "significant" events happened (tire pressure change, first oil change, 93 octane use for Trifecta Tune, and K&N CAI install) so that you can be informed when looking at the data.
Once I had the data, I charted by mileage (as dates of fill up had no meaning to the car), as some feel that the engine "breaks in" and this would allow to see that effect (if any). I then grouped the data by quarter of the year (1st Qtr. Jan - Mar, etc.) so it could be associated with "seasons". I color coded these groupings as marked them (blue for winter, green for spring, red for summer, orange for fall) on the chart. And, I've broken down Max/Min/Avg/St. Dev by season, and listed it for overall.
I can't think of any other meaningful ways to display the data... but could break it up differently if so compelled to do so. With all that said, I see the best fuel economy in the summer (go figure) and worst in the winter (again, duh).
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