Excessive oil consumption

[d.grimm]

Continental C85-12 with 0-200 crank and pistons.
Good compression, 75+ all cylinders, no external leaks and just a few drops out of the breather during a hour flight.
558 hours on NEW Continental cylinders.
Borescope and the valves look good with lots of deposits on piston top and head.
Up to a quart of oil (Phillips 20W50) every 2 1/2 hours of flight.

I’m thinking the intake valve guides are shot and it’s sucking oil
In from the cylinder heads.
Is this something the TCM cylinders are known for?
Do you think I’m on the right track?
Thanks,
Dave

 

[jimmy]

 

[JimC]

 

[jimmy]

 

[JimC]

 

[Captalbertq]

 

[cubdriver2]

 

[SkipB]

 

[bob turner]

 

[d.grimm]