|
I don't believe in using GPS. I'm like a non-violent Neoluddite - I don't even have a smart phone.
31 in. tires / 27.7 in. tires = 1.12 (times faster than speedo)
60 MPH * 1.12 = 67.2 MPH
I drove a mile on the interstate at exactly 55 MPH speedo (55*1.12 = 61.6 MPH), it took me 59 seconds between mile marker signs.
61.6 MPH = 1.027 miles / minute
59 seconds / 60 = 0.983 minutes
1.027 miles / minute * 0.983 minutes = 1.0095 miles
Looks like my variance is less than one percent or so. I realize there will be some discrepancy but that is inevitable. -1% MPG would still be higher than 28 MPG.
|