Hi,
I think its more advisable to use ESSO 8000 for your petrol. Better
burnt thus more power.
Anyway, 13-14km/l is quite okie.
My Civic 1.5 is abt 10-11km/l. & currently I'm using Shell 98,
ESSO 8000 equilevant.
By the way, DOHC car is definitely better than SOHC. In general,
better power.