Yes definitely driving skills and gear tuning matter, what irks
me most is buses which go down from 6th to 5th because a driver
kicks down, especially on Scanias. That way there isn't much fuel
savings as compared to going to 6th and staying in the lower revs.
But generally on the 6th gear at 60, a ZF will have better fuel
economy than Voith, provided that the driver doesn't kick down to
5th.
Pro and cons...Its always SG buses have this problem..Other
countries Voith A22s doesnt have any problem..Should raised to 63
kmh better..