It's possible that detached CCV hose accounts for you loss of oil but I'm not convinced as any oil going thru an attached CCV hose would go into the turbo/thru the intercooler/into the intake/out the exhaust and the lost anyway.
You may need to degrease your engine, possibly use oil compatible UV dye, find leak. However with noise I'd immediately pull the air box to turbo hose. Check the hose for a tear on the bottom just in front of the turbo, check the turbo fan for play, and check the turbo supply line and drain line for oil leaks. On reinstalling that hose be sure the upper end touches or nearly touches the MAF sensor and don't godzilla the clamp lest you crush the air box outlet.
_________________ Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs
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