imported_BWK

hey guys i just but b18b motor and i'm getting real bad fuel mileage out of it. 250-300 km on a tank 1/2city 1/2hw
it is b18b motor with s1(sir) tranny
runs great though
i have tried different ecu new o2 sensors
checked for fuel leaks and can't find none

i just don't know where to look next

motor is in 92 hb si

any ideas?

GrEEn

is your foot on the gas alot

cause it depends on the driver of the car.

if i drive like a nut the i do 200-300k but if i drive like a mature driver then i get 400-450k

imported_spl_civic

getting any engine codes?
had this problem too...
i had a bad 02 sensor
the sir tranny might add to your problem, cause of the shorter gear ratio