95 850 NA Burning oil after rebuild

[Sveedy]

Looking at the valve seals - don't some of these engines have 6mm valve stems instead of 7mm ?

[fredt2]

What oil viscosity is in the engine?

Did it burnt oil before rebuilt?

How about valve guides?

Did the ring had out of spec gap when you put it into a sleeve and leveled with a cylinder....before putting it onto a cylinder?

Was pcv system cleaned or replaced during this job?Could be clogged...also flame trap could be clogged.

Currently using 15w40

Sometimes burned after sitting idling or on a traffic jam, or when revved cold

Probably not valve guides, I've rarely seen these fail, and as I didn't mess with the valves when the head was off, I doubt they would suddenly fail like that

Well, I forgot to check for ring gap while I was putting it together, probably screwed up there

And yes, I cleaned the entire PCV system when the head was off, hoses, catch can, oil galleys and so on

Also, just did a compression test, looks normal to me:
Cyl 1 - 180psi
2 - 205psi
3 - 180psi
4 - 185psi
5 - 188psi

Could be fake since the amount of oil getting into the combustion chamber