[FiShNc]

I've been getting around 29-31 mpg city and highway on my CRX HF for about a year now and found dirty oil, plugged PCV valve, lazy O2, what i think was dirty injectors and intake manifold, and a thermostat stuck open. I've driven a tank or two after each "fix" with no improvement except when I "cleaned" the injectors with Techron and redline SI-1. I jumped up to solid 41mpg on the redline tank but dropped back to around 30 on the Techron tank. I can't explain that.

Anyway, I just replaced the thermostat so hopefully all the problems are solved and my mpgs will finally come back home. Wish me luck or supernatural skills in finding and fixing further problems. :-)

Also hello everyone! It's great to be here!