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Big Mileage Variation (23-30mpg) On Trips 200 1987

My son has made a couple of runs to Georgia and back from upstate NY this Fall, and is puzzled (as am I) about his mileage. He is quite car savvy, and tries for consistency with fill-ups, etc., but can't account for the variations he gets on consecutive tanks.

These variations don't seem to correlate to weather, wind, or terrain, and have been noted on ~600± mile runs in both directions on I-81.

He used to get 30± on trips in the '83 turbo wagon with M46, so I don't believe it's his driving habits. This '87 Auto wagon is a nice-runing, with about 230K miles on it.

He's heading South again in a couple of days.
Any ideas?
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






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New Big Mileage Variation (23-30mpg) On Trips [200][1987]
posted by  lucid subscriber  on Wed Dec 28 10:00 CST 2005 >


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