patipiran verus performance.. it's always relative.. a personal choice.
personally, 6-8 km/li in traffic from a 4 door sedan that size, leaves much to be desired..
Depends on the traffic.
Nowadays, I'm not shocked to see as low as 7-8 from Vios-sized (not just the Vios, mind you, but its competitors, also) cars. Traffic nowadays is bad. Ramos-era 3-5 km/h average bad.