View Single Post
Old 04-16-2013, 07:49 AM   #4 (permalink)
sheepdog 44
.
 
Join Date: Dec 2011
Location: Salt Lake valley Utah
Posts: 923
Thanks: 114
Thanked 397 Times in 224 Posts
Quote:
Originally Posted by bestclimb View Post
My Subaru cruses 60mph on the flat at 27-30 mpg. up a hill it gets 15-22 mpg. Down the same hill engine on coast it gets over 150mpg. (15+150)/2=82.4 mpg. If there are no reasons to stop at the bottom I love hills.
2 / (1 / 15) + (1 / 150) =27.27mpg < 27-30mpg. You always have to climb up the same hill you went down, and Ideally, your average can only be double the mpg you had while going up the hill.

If your going to drive with load, your going to be varying your speed considerably. And if your going to coast down hill, well, your now your just doing P&G. And P&G on a level road will always get you better mpg than a steady cruise, with the exception of leanburn.

Level roads are also idiot proof. You just have to stay at your target mpg/speed, and your golden. You have tens of thousands of people everyday saving fractions of a gallon on the flat route and it adds up.
__________________
I try to be helpful. I'm not an expert.
  Reply With Quote