Oil consumption could be from leaky valve guide seals or from worn piston rings, or both. If the engine puts out smoke when you pull away after idling, and then the smoke goes away, that usually means the valve guide seal are leaking. If this is the case, you may be able to just replace the seals for a few dollars and drive many more miles. Usually a 22r will go 250K before an overhaul of the engine. Use whatever 10-30 or 10-40 oil is cheapest, check the oil deals elsewhere on this site. Don't bother with additives that purport to reduce oil consumption. For 22R rebuild parts, check the engnbldr.com site. There is a lot of information and they have reasonable prices and good parts. You might talk to Ted at engnbldr about just replacing the valve guide seals.