Burning oil + White smoke = Bad Valve Stem Seals?

[Jasemas]

H22's are notorious for destroying piston rings
That FRM sleeve eats at them like nobody's business
Do a rebuild

[VH770]

if you want to find out if your compression and oil rings are worn, do a compression test before and after squirting some oil down the spark plug hole. If compression is higher after squiring oil, your rings are worn.

usually valve stem seals show up as smoke on startup and deceleration (more than other times), but also acceleration. If you are experiencing smoke at all times (i.e. cruise, as well as accel/decel/startup) it may well be a combination of stem seals and rings. It's not necessarily a problem by the way; old engines have huge tolerances and still run for many more miles before requiring a rebuild. As long as you don't starve the engine of oil it's not necessarily a problem to burn oil, it just reduces fuel efficiency, costs a lot in oil top-ups, and is embarassing/bad for the environment.

Also keep in mind that a damaged head gasket could leak oil into the chamber, but you'd most likely also observe overheating/coolant loss as well as what you've described, so by the sounds of it you aren't facing a head gasket issue because you haven't noted overheating/coolant loss. White smoke can sometimes mean water, but it's not a foolproof assumption by any means; could simply be oil mixed with other impurities from the crankcase. But do keep in mind that a head gasket can fail at one of the oil passages only, and not affect any of the water passages. So a head gasket IS a possibility to keep in mind.

I'd advise fitting new valve stem seals, this can be done on most engines with the right tools without removing the cylinder head, but admittedly i've never done it on a honda, so it may be easier to remove the head and do them on the bench. Coupled with the other possible causes of oil use i think the best step forward is just to remove the head and deal with everything at once (head gasket, stem seals). With the right tools and patience, removing a cylinder head is not a hard job. Also, while you're there you might as well hot tank the head and recondition it with a new head gasket if it's been in service for a while.

cheers