Volvo S80 V8 cold start puff of blue smoke

[Jackazz]

I didn't actually ask for how many of the plugs had oil on them. Car has never run low on oil tho.
I agree that it really sounds like valve stem seals..

It's probably too early to celebrate, but today when i started the car, there was no smoke. But it's only this one time. If it doesnt smoke tomorrow, then i might be lucky. I'll let you know!