I know this one. You're burning pooled oil which runs down around the valve stems when the engine is not running. With 160K you are probably due for seals, guides and a valve regrind. I just had my '89 300E done (as part of a repair on a blown head gasket). The guides and seals were toast, despite frequent oil changes. If you love that car, then bite the bullet and have the work done. Pricey, but shop around, or DIY if you are so inclined Had 165k when it was done.
1987 BMW 325
[This message has been edited by jeffsr (edited 04-17-2000).]