View Single Post
Old 09-17-2008, 03:39 PM   #19 (permalink)
Matt Herring
Master EcoModder
Matt Herring's Avatar
Join Date: Jun 2008
Location: North Andover, MA
Posts: 857

Bone's 2010 Prius - '10 Toyota Prius Black
90 day: 56.78 mpg (US)
Thanks: 5
Thanked 23 Times in 19 Posts
My built-in 4runner mpg gauge always reads much more optomistic mpg than I actually record when I do the math to make an entry in my fuel log. Usually it's in the 2.5-3mpg range.

I have noticed that it is way more off on city driving than highway driving. On a recent highway only road trip my mpg gauge was only off by about .5 mpg. Usually on my 90% city/10% highway tanks it's off by as much as 3 mpg!
  Reply With Quote