Welcome BH...First of all, post what engine you have...and list in your user profile your location...thanks
There were issues with the 4 cylinder models with clogging PCV valves and that would result in massive oil consumption and blowing out main crank seals..basically toasting the engines.
I copied this from another thread here..
Terrain with the 2.4L Ecotec engine suffered high oil consumption followed by a totally blocked PCV tube which caused a blown real seal. Exactly as described in Technical Service Bulletin #14882 which advise of an extended coverage for this failure. For 8 models in the 2010-2013 model years including Terrains and other models using that engine and series LAF, LEA & LUK.