⚠️ 2018 Buick Encore burning 2 quarts of oil in just 3 days! What could be causing this? 🤔

Mrdia-EX

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Buick Ownership
2018
On Saturday, I replaced the oil, and the dipstick showed the level was full. Today (Tuesday), after just 3 days, I guess 150 milesI checked the oil level, and the dipstick was completely dry. I added 2 quarts of oil, and now the dipstick only shows 1/4 full. There are no visible oil leaks and no smoke from the exhaust. What could be causing such rapid oil consumption?
 
It has to be a leak or burning, no place else for the oil to go.
 
There are no visible leaks, but I suspect my turbo is failing. Just got a P0299 (Engine Underboost) code. Since the check engine light came on, acceleration from 60 to 80 mph takes forever. Some say damaged turbo seals could explain the extremely high oil consumption. Any thoughts?
 
Have you noticed any blue smoke coming from the exhaust?

Also...how many miles are on the engine and what have the oil change intervals been?
No Blue smoke, ~100k, oil changed every 4~5k miles
 
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