Civic EG

Seems like my gas milage is so crappy. On a full tank of gas I should or use to get 400 kms at least. I'm at a quarter of a tank and I only went 200kms. . . . . What are common issue that cause bad gas milage. Taking into affect my civic has 203 000 kms. . . looks like the previous owner didnt take good care of the engine and I owned this car for 4 months. . .

Could be many things. fuel system, intake filter needs replacment. Tire pressure could be off, bad alignment, you drive crazy/ bad gear choice. compression, the list can go on and on.

Do all maintenance, replace what should be replaced. check systems that should be checked.

Then come back for help if things dont get better