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Old 09-10-2008, 01:48 PM   #23 (permalink)
MazdaMatt
Master EcoModder
 
Join Date: Jun 2008
Location: London, Ontario
Posts: 1,096

2k2Prot5 - '02 Mazda Protege5
90 day: 33.82 mpg (US)
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I believe that the justification would be shorter paybacks... you're forgetting that you aren't just following the sun for the sheer fun of it, you are doing so to increase your system efficiency. The idea is to make sure that you increase in cost is paid for by your increase in efficiency before the payback period is up for a non-tracking system... if not, then don't track.
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