I do 90/10 hwy/city average speed almost always 46/47 mph. 134,000 miles orignal brakes on my XFE, drive without brakes and N coasting. 38%+ EPA while always driving PSL 55 mph. Drove KT's Cobalt for a week, 38%+ EPA with it as well. IMO simple driving get to that almost 40% over EPA combine. At 70 MPH my cobalt xfe and wifes Impala get rated HWY.
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