Lexus dealer did this to my wifes car in Atlanta. But they did not put oil in engine and the oil light and check engine light came on as I was pulling out of dealership. It had 90K miles on the car. At 120K miles the tail pipe started smoking on startup I traded it. Dealer paid for 90K service and warranted the engine for 30K miles. At the time it started smoking I lived in Springfield Missouri and did not want to drive to Atlanta and fight with them. But I did trade it into another Lexus dealership that did not know it was smoking at startup in the morning, at least when I traded it in
. Document and have the service manager there when you guys look at what happened. You will need a new engine. Good luck and keep us posted.