Blue exhaust smoke

Have a 1985/1(early model) Porsche 944, 2, 5l eng, with 114,000 miles on it. At idle or under normal driving conditions I notice NO blue exhaust smoke. Only when in neutaul and I rev'd the engine once too about 3-4000 RPM's. Killed alot of bugs. But going back to normal driving conditions and idling, nothing, did a compression chk. Thottle open, all plugs pulled, and eng, @ normal operating temp. All 4 cyl's jumped too 120, then 150, and stopped at 160.
Accepptable range for this car is 145+psi. Did'nt really bother too drop some oil in the cyl's figured I was okay, with the rings. Checked the plugs, #1 looked normal lite tan, normal burn, #2 oilly, moist and black, Not burnt. Same condtion on #3 as #2, #4 looked like #1. Am I looking at poss. Rings or valve seals. I'm hoping seals. Forgot to mention this car hold's about 5.5 qts of oil, I run 10-40 in summer and store in the winter. I 've burned thru about 2-3 qts of oil in the last 3-4 years, I only put on about 1500 miles a year on it, what do you guys think? Thanks