TomS wrote:
Highway mileage is calculated at speeds approaching 60 mph (100 km/h). When you go faster than that, mileage starts to degrade. At 75 mph (120 km/h), you are probably getting 15% less mileage.
You're so right. I drive about 70 miles round trip to work each day basically door to door highway (with occasional mixed/city driving). I used to average 70-75mph and get 30-32mpg tops or about 330 miles a tank.
Wondering how much this speed thing is actually related I slowed my average to about 63-67 and have averaged 35.2mpg on my last 3 tanks (389, 392, 387 miles/tank). Considering I live in the Northeast and these tanks are over the course of about 6 days I'm way happy with that. Makes me wonder what I would get on a single start full tank. I haven't taken it to my hometown in FLA yet (no cruise = angry ankle in a drive that long...although a broomstick works brilliantly).
So at 27 I drive like a right-laned granny now. I get to and from work a whole 3 minutes later. It'll save me a tank of gas every two months or so. Works for me. Oh and I have a 6 speed hatch.