bishois

Hey, I have a 09 Lexus is250, and been having issues with my range. Im not sure why I get 230-240 miles for a full tank. Been using 93 ever since I got it, it started messing up the past month or 2, and I used to get 310+. Does anybody know what could be the issue going on, and what I should try doing to fix it‽
Thank you

Inactive

Interested in this too, I used to get a flat 300 on my 06 IS350, now i'm getting around 225 on a full tank.