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my rough averages i worked out over my ownership. about 60/40 hwy/city under normal driving circumstances. (maybe 1-2 wot runs, otherwise just normal cruising around)
27 mpg stock,
26 mpg 18x9.5 wheels w/ r-compound tires
18 mpg w/ same wheels but running e85-90
21 mpg w/ supercharger on 91
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2014 WRB BRZ
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