bro, sss + proper manual gearbox is the most awesome combination and yes the performance difference is huge due to sss auto share the same gearbox with 1.5 swift. i'm still on ron97, sometimes i did mix with ron 95 thou when the kiosk only carries ron 95. fuel consumption the best i managed to get was 480km until the warning light came out but that's only my long distance journey to kelantan. city drive normally around 380km average per full tank on ron 97.