unsure about the current subaru, but the 2012 gt I had beat out the 2009 sti I had in fuel economy by about 1-2 mpg. Also both cars like 93 octane gas. having had both, if I had to pick one and say I don't live in Antarctica: the mustang was way more fun than the Subaru every time. » 12/17/14 11:26am 12/17/14 11:26am