Hi, I have a 97 Civic with 165k miles that seems to run strong and get
good gas mileage. I do courier type work and have been getting 38 to
40 mpg. I do use a fair amount of oil, about a quart every 700-1000
miles, although I don't notice any smoke. Passed emissions three
months ago.

I haven't done wet/dry compression test yet but will soon.

I guess my question is whether burning oil usually corresponds with
lower performance or gas mileage? Do bad rings or seals just let oil
in and then "seal" under the power stroke/pressure?

Thanks for any ideas... Tim