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      11-03-2016, 08:58 AM   #5
rking117
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Drives: Z4 3.0i & 320i
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the difference is also incremental. the faster you go the more it is off. More like a percentage than an actual miles per hour. like when I'm doing 35 I'm actually doing 33. but when I'm doing 70 I'm really doing 65 etc. This topic has been discussed for years on BMWs
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