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For the 93rd time, leak down on anything other than an operating temp engine means less than nothing. It’s a trend monitoring tool, exactly, nothing more, great you have 6% on a super cold engine, so how often do you drive a a super cold engine all day? I have done more than a thousand on aircraft and cars. The majority of problems on these cars is they flat out don’t get used enough for the oil additives to activate, rings get gummy and stick, crud on valve stems and seals. Oil consumption is related to 3 or more factors, 1-valve guides, 2-piston rings, 3-start up, the contents of the oil tank is in the bottom of the engine, splashing and getting whipped into a froth until the scavenge pump clears it back to the tank. The oil sticks to the cool surfaces and lollygags it’s way back to the sump and scavenge pump until the engine is up to temp. I saw more than a few aircraft engines corroding internally, scrap after sitting for most of their life. Drive a thousand miles a month for 6 months, you won’t believe how good it will be running.