compression test results!

alright I did a compression test on my 91civic dx to find out why I am loosing so much oil and here are the results
(cyl #1: 163)(cyl #2: 155)(cyl #3: 157)(cyl#4: 152), now I look up the specs and I think I should have a compression of 175-185(?) so this means on all cylinders there is some sort of a problem, but this doesnt seem bad enough to cause the loss of a qrt of oil per 400-500miles, does it? I must add I did this test after I did a valve lash adjustment so I dont know how that could effect this! let me know what you guys think...

thanks in advance

could be a few of things, piston rings are not sealing properly or valve seats.

try this, put a spoonful of oil in the cylinder and re-test it. if the result is higher your piston rings are not sealing properly, if result is similar, the valve seats are to blame.

time to do the leakdown.

135 should be about the minimum. Also, each cylinder is pretty close to the 10% margin. You dont have a perfect motor, or a bad motor. Just a little tired.

I agree with Kris. I think the compression should be somewhere between 135-185. With yours still being where its at, I would just see it as a tired motor, nothing too serious. If it were lower than 135, yea, check the rings, then the valve seats, but I wouldn't worry about it yet.