Thread: Low Gas Mileage
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Old 01-05-2013, 07:46 AM
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X3-terrestrial X3-terrestrial is offline
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Quote:
Originally Posted by AzNMpower32 View Post
and unless you're resetting your Board Computer on the hwy drives,
^^Very important point!

O2 sensors will trigger a CEL when they fail, but I've read that they start losing "optimal "efficiency after 100k. I still have mine at 125k miles as well but probably will change them before 150,000.
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