2001 Civic Lxi has the same engine as the EK series. PH15 non vtec. My EK Lxi M/T, can only consume about 12-14 kms/L on a Highway long drive. City driving is only about 8-10 kms/L. I'm also using an ES model VTEC3 A/T VTI-S, fuel consumption of the EK Lxi is cheaper than the ES-VTEC3.

The PH15 engine is reliable and fuel consumption is very good specially on a long drive. Goodluck!