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Old 12-06-2017, 12:18 PM   #1 (permalink)
Subaruwagon
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Join Date: Oct 2017
Location: Lancaster, Pennsylvania
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Lorelai - '05 Subaru Outback XT
90 day: 21.7 mpg (US)

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High altitude fuel economy

I was just wondering if there would be any noticble difference in fuel economy at high altitudes compared to driving at sea level due to the lack of oxygen meaning less fuel and having to open the throttle more reducing pumping loses? I live at about 700ft so this doesn’t apply to me but I was curious if it makes a real world difference in mpg numbers.

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