I'm interested in doing a compression test to see if the engine is "healthy". If the engine is pushed to redline or revved hard on idle. White smoke does appear but i drive normally and on a light foot and it hardly reduces oil and if put your foot down, the car accelerates pretty good and it's got enough power to run with AC and i haven't really felt it underpowered unless i got 2 people in the back. It did overheat like once when i was coming back to home and hope it doesn't make things worse.