My Subaru Lifetime FE

Lifetime FE of my '97 Subaru. Noisy blue line is individual tank Fuel Economy. Yellow is a 10-tank average, weighted by tank distance so short tanks do not cause excessive distortion. Red year markers are for ~January 1, to mark the winter lows. Green line is EPA (2008) Highway rating. Original EPA sticker 21 City / 27 Hiway / 23 Comb. 2008 EPA sticker 18 / 25 / 21.