One problem related to engine burning oil has been reported for the 2015 Buick Encore. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Buick Encore based on all problems reported for the 2015 Encore.
Had an oil change at dealer (typical 15,000 mile check). On the return trip to home, engine started to miss, smoke was coming from back of car like oil was being burned and the engine "check engine light" came on and the car was stopped. Called dealer who had car towed to their location. While waiting for tow, I checked oil level (it was over filled by at least a quart (maybe more), dip stick was not seated properly to check oil level. When the tow truck drive arrived and hooked the car up to tow, he indicated that the passenger side bolt that holds the engine to the frame was missing. He indicated that he would tell the dealer (colman Buick) about the problem. Later on the second day at the dealer, they said they were working on the car all day and were in process of replacing all fuel injector (don't know how they could go bad in 13k miles) and the smoking of the car has been reduced (somehow oil is getting past the rings and is being burned. Two days and still no car.