I have a 2006 IS 250 with 147,000 miles on it. I got an engine misfire about a year ago and in the last six months have been burning oil increasingly faster. I brought it in to the dealer and qualified for the customer support program. They are fixing the engine under warrantee. My question is how long does this take to repair?? They have had the car a week already with no word on how much longer they will have it.