I recently replaced my fuel filter, o2 sensor, thermostat, replaced oil and filter, change coolant.
Now I'm still getting the same fuel consumption which is about 300-320 per tank,

Just wondering if theres any other way to really get more, as a lot of other friends with dc2r's are getting 400+

Mods:
-Intake
-Exhaust b-pipe/muffler
-Stock Headers

Petrol: Shell 98 or sometimes 98 BP (i see no difference in fuel economy/driving).