2nd worst automotive decision I've made was to sell my 2008 Si (worst was buying a 2000 Mercedes E-class for the wife).
In 3 years and 75,000 miles of ownership, it was gas, oil, go.
That's it. Never once did it darken the dealer service bay for anything.
Window sticker says 29mpg highway and that is WAY underrated.
I easily got 34-35 with the cruise set on 70, and that was with 10% ethanol fuel.
Real gas gave me as high as 37mpg once.
With the HFP suspension and Michelin Pilot Sports, this was the best handling car I've ever owned.
Other cars may be faster (GTI, WRX, Mazdaspeed 3), but the Si is absolutely THE BEST blend of comfort, performance, reliability and economy.