Crankcase pressure results - is 5.8 bad?
 

I've been under the impression my AOS needed to be replaced. I'm burning through about 3 quarts of Mobile1 over each 5000 mile oil change interval. My AOS is 16,000 miles old and there is a slight amount of liquid oil in the tubes between the AOS in the intake. However this evening I connected a pressure gauge to my oil tube and am only pulling 5.6 - 5.8 inches at idle. I hear 5 inches is normal.

Is 5.8 inches reflective of a bad AOS?

Depends upon inches of what. You should be around five inches of water, while most vacuum gauges are in inches of mercury, where 1 inch of water equals 0.0735 inches of mercury. So if your gauge is in inches of water, you are fine; however if it is in inches of mercury, you are in trouble.

Yes inches of water.

Any thoughts to why my AOS is passing oil but pressure readings are normal? Should I replace it or not?

how many miles on motor?

The AOS will pass oil well before it totally craps out. Yes, I would replace it,

About 62,000.