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Old 02-04-2025, 12:33 PM
X5chemist X5chemist is offline
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Location: Austin, TX
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Mine does the same thing but not that drastic. Winter fuel sucks. Summer fuel gives better MPG.

How old is the fan clutch? Check all the belt pulleys for drag.
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'06 X5 3.0i - bought @143,123 miles (12/26/20)
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