We too have a Vios, and ‘she who must be supported’ had it blinged with remarkable results this time last year. If I was you and I ‘owned’ an old shape Vios auto, I'd hang on to it. Ours has done nearly 130k kilometres with no serious problems, and if anything does go wrong almost anyone can fix it. A new Honda City is marginally less economical, despite a 5-speed autobox. The latest Vios is bloatedly ugly. After that you're up to a Corolla Altis (Bangkok taxi), and the only way they are more economical (in cash) is with a boot-full of LPG tank. Unless automatic, they are very low geared. Diesel pick-ups are much less economical. The best (Isuzu D-Max, Chevrolet Colorado) 2.5 iTEQ and 3.0 iTEQ do about 35 - 36mpg. The others, including Fortuners, do around 30mpg. Toyota Wish, etc, are even heavier on the juice. About 25 - 30mpg.