caltex silver or shell premium. Can't tell the diff coz i use diff cars, but one thing though, it all depends on your driving style, your route going to places and the time of day. Coz for me, Katipunan-libis-c5-shaw, at a colder time of day, and with almost minimal braking, so tipid. And make sure you gas up either early morning or at night...so the gas wont be expanded.