Hi,

I have a fuel consumption problem on my 97 Civic.

I'm only able to do about 350 kilometers on a full tank. I used to be
able to do anywhere from 450 to 550 kilometers.

Granted that it's -20 Celcius these days here (montreal), I am
comparing my mileage to a friend of mine who has the same car, same
year. He made 490 kilometers last week.

I am an ignorant when it comes to auto repair. I want to know if fuel
consumption is an easy problem to diagnose for a Honda mechanic. I
don't want to spend hundreds of dollars and not get any result out of
it.

Thanks for your insight.