I agree with check the PCV system. I particularly like Robert from YouTube's glove test. With the engine running -*caution* do when cold- replace the oil filler cap with a rubber glove so it seals. It should not inflate at all. If it does, the PCV system needs to be replaced. (Can also check plugs for wet oil, and flame trap elbow etc, but the glove test is awesome) The parts are not super expensive, but it involves removing the intake manifold, which is not too hard except for a couple bolts underneath. FCP video is great BTW, it looks like a lot more work in newer cars (not looking forward to it) Good to hear you use synthetic, because it doesn't cook and scale, & clog things up. Sorry to be adding something to your list, but the PCV is good to do at a regular interval anyway, because there is so much heat, that hoses can become brittle and break, and vac elbows fall of etc. affecting performance. Don't replace the flame trap. A little oil consumption is not awful, but it sounds like you might have a symptom.
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Farewell 'black manta' ('97 850) Hello 'rocket sled' ('06 V70R)