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Old 02-10-2012, 09:20 AM   #16 (permalink)
gone-ot
...beats walking...
 
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...I've "measured" drops in MPG ranging from 10% to 14% on my Vibe with A/C, but back-to-back A-B-A testing was NOT exactly 100% "repeatable"...LOT's of variation.

...hence, I 'rule-of-thumb' A/C at 10%-15% for my car...others will obviously get different values, but probably close.
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