Originally Posted by hhcchen
regular gas before vs premium gas right now...?
Glad you asked. my 2.5i knocked on regular, so I was running mid-grade in it. There's a 10 cent bump for premium in addition to the 2mpg I've lost.
Of course, if I cared I could run mid-grade in the WRX. Several WRX owners have told me their cars run fine on it - no pinging.