I'm almost near Empty on this 91 CRX, and i'm only at 160 miles! The engine light also sporadically comes on once in a while for a few seconds/minutes, but by the time i pull over to check for ECU codes, nothing blinks. And at startup, the ECU doesn't throw any codes. Everything's stock btw. And I mostly drive city, with some highway thrown in. What could be wrong?

 

i guess since you don't have any codes to go by, check your o2 sensor first.