I've got a 93 Civic with a 94 b18b1 with ~185000 miles on it. It doesn't smoke on start up, or even when I really get into it. My gut feeling was bad rings, but it's not smoking. The guy who had the car before me told me the cam seals were leaking, but it's running through a quart every 500 or so miles. There are no drips in the garage, so I'm stumped.

Any ideas?

 

try a compression and leak down test. the oil got to go somewhere now. double check on the color of the smoke since if your car is burning oil, it will emit a blueish smoke.

 

Seals would seem liek the problem try a leak down test!

 

Valve job

 

Maybe, Cam seal or gasket on oil pan. When the car is sitting it does not leak that much. It's when it runs the the oil is pressured out. Leak down test. Good luck