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Thread: Fuel economy
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Old 12-30-2012, 06:09 PM   #32
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Join Date: Sep 2012
Location: Old Greg's Cavern
Posts: 12,672
My Ride: '13 128i, '04 330Ci
Originally Posted by chrism24 View Post
So what other side-effects would a broken thermostat bring?
Not anything that will hurt the engine. It can hurt fuel economy because the engine doesn't reach operating temperature. That's about it. I drove mine with a broken thermostat for a few months.
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