Since nobody reply yet, let me try to answer my pov.
I used to drive the Lancer convert CM5A 1.8 Turbo, Full tank around RM 70-80 if the low petrol fuel blink till can't turn off. Can go around 350 - 450km. 350km around town area and 450km got go kesas, nkve, not really outstation as last time tried can hit up to 500km + - there travel to ipoh. But no spirited driving, just maintain 110km/h - 120km/h sumtimes 140km/h for overtaking. Since not 4WD so can't really comment much for those running evo, but I believe most of those convert should have more or less same experience.
I do have another ride which is my daily driver from p2, and the fuel consumption is actually slightly better, so sometimes I would drive the p2 coz it's smaller, easier to zig zag and to find parking. Currently, the Lancer is usually parked at home, and used my other family members. But due to my plan to do it up properly, so might be making it my full time daily driver. For not in town driving, I believe driving Turbo car will consume slightly more petrol, but u get more power so it's a pro or con depends on how u look at it.
For maintaining it, well, again since it's turbo, u must make sure to change engine oil every 5000 km or 10,000 km depends on how a'nal about it. For me, sometimes I snake abit and delay till 10,000km or 20,000km only change. Only using semi synthetic, altho cost not much, if every month service also can't tahan, sumore don't really drive in a very spirited way, I think I am one of those apek drivers around, most of the time when driving the Lancer all p2, p1, honda, toyota, all overtake me easily.
So for those who only have 1 car, and it's your daily driver, I do think it might be an issue as when u service it, or when got any problem, you don't have any transport edi. So best is to do all the maintainence accordingly, don't delay or wait else you might have problem traveling. Haven't done any tracking yet, maybe one day got chance.