Its going to be robust to switch a RWD automotive with one which will get good gasoline mileage as RWD = sporty and sporty as a rule imply sacrificing effectivity for energy.
Should you’re pleased with a FWD automotive (yuck) i’d take into account a used
-Corolla Hatchback-Mazda3-VW Golf-Civic SI
The one RWD vehicles that instantly come to thoughts are
-Toyota GR86 (unsure if these are terribly environment friendly, however they give the impression of being good and are sporty)-Mazda Miata-Lexus of some kind? I am not overly acquainted with the Lexus lineup however i believe the IS250 and e90 may need some similarities. Its a 4-door sedan that appears fairly respectable, related energy, and is available in RWD or AWD. I dont assume they get superb MPG although, however not dangerous MPG both.
Hope this helps and good luck!