so far from my experience..i think u need try to get better ecu or use standalone ecu.and get the right tuner.mine stock also but medium mod also can consider high fuel consumption.actually 4wd and 2wd got different.last time i got wira e3 with 2.4 stroker kit. but the fc not high as mine evo now..my friend e5 also got high fuel consumption juga.hhuhuhuh. nvm just try get power fc also good already if wanna retuning back to your car.if reflash i dunno how many function can setting back. =) just my opinion.coz last time my wira use haltech kot now evo apa pon tarak taruk huhuhu.if rm50 petrol per day can consider high also bro.mine if full tank can tahan 2days or 3 days like that je..