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Old 09-01-2020, 10:37 AM   #216 (permalink)
mpg_numbers_guy
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Insight - '06 Honda Insight MT
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Cruise control mainly hurts fuel economy when it applies the brakes, or, in an automatic, when it causes an unnecessary downshift.

I actually found that using cruise control on the G2 Prius actually helped me maximize fuel economy, except for steeper downhills where I would let the car coast in D with a bit of regen.
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