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Q: Blue smoke (oil burning), valve tap, power loss occacionally when engine under stress on 2006 Chrysler 300

I've had my 2006 Chrysler 300 for about 6 months and noticed
it burning oil occasionally when under stress (driving up decent hills while trying to accelerate) or when rounding
a turn and accelerating out of it at a decent speed.
First crack was to replace the PCV valve, but two weeks
after that I'm seeing the problem again, less frequently
but under the same conditions as before.
Any ideas? Do I need a "heavy duty" PCV valve?
Only 67000 miles on the engine. Any suggestions for diagnosis?
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It is hard to determine because you probably do not know the vehicles history. It is possible that your engine Valve Guide seals are failing.
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