When I first bought my 1992 Integra RS a little over a year ago I was getting about 450 kms to a tank (still pretty low from what I've seen online), and now its down around 350 or so.. other than replacing the o2 sensor, what else could I do to get my fuel economy back up to where it should be?

 

Lots of things. Check tire pressure periodically. Air filter, cleaning the TB, spark plugs, intake clean.

Just a few off the top of my head, I'm sure others will chime in.

Edit: Should ask, is the check engine light on?

 

Compression test?

 

Mo check engine light and havent done a compression test. Guess that would probably be a good starting point though. Thanks guys

 

There are a lot of things you can do, but the most obvious:

Replace Air Filter
Check if your catalytic converter is still good
Clean your injectors or have them replaced
Check your throttle body for any carbon buildup, same goes for the head
Replace your spark plugs
Check your tire pressure

There are other things to do as well, but I would start with these as they are the simplest things you can do.

I currently own a GS-R, my second and know enough about them to get by. If you have any questions, just post them up and I'll be happy to help where I can.

 

if all goes to plan i'll be spending a full day working on the car sometime this week, so I'll be sure to go through that list. thanks! I appreciate it