Been driving my 2011 Sonata w 4900 miles on it for a year. Been using Shell regular gas & getting 26.5 mpg avg. 2 wks ago I filled up w the mid value gas by mistake. Now I'm getting 29.5 mpg! with the exact same driving habits.
An increase of mpg like that makes the mid value gas cheaper to use! Anybody else have this same experience?
TIA Scotty