Hi All I'm 2nd time proud owner of Prius. My last one was 2007 which lasted me to 179k miles before engine fail and now I just bought 2014 Prius First few mods: Thinking about replacing clothe seats to leather seats Added wider mirror Thinking about upgrading wheels to Rav 4 17" wheels - what impact do you guys think it'll have on MPG?
I would recommend cleannng egr circuit and intake manifold before moving on to anything else. That will keep it on the road, whatever add ons on exterior upgrades will stay on the road also.