need some help mga guys..
we own a 2007 model Chevrolet Aveo..
now the problem is, our gas consumption is 6-7 km / L... nagpa tune up na mi before.. na-abot na kuno to'g 12 - 13 km / L.. but karon, kusog man ghpon mo kaun og gasulina..
kada simana mi mag patubil og full tank.. but sauna, naa mi lain car, 2weeks ang full tank namo..
any advice? Suggestions? thanks..