Quote:
Originally Posted by Kuato2084
Does RaceChip actually improve MPG (while driving economically) up to 20%+? Added power and thrill aside, that significant of an improvement in MPG would make getting RaceChip a must.
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It is a slippery slope.
In order for you to notice the MPG gain, you will have (which is very hard) to drive in the same behavior as you normally would.
It is hard to resist to drive like a grandma (at least my grandma, lol) with that much power on your foot.
In this case of X3M S58, 20% would be about 3MPG based on average of 16MPG.