yeah it will leak if you beat on it LOL thats how they usually go out on diesel trucks. drivers pushin too hard with heavy loads...up hill, down hill, on their jake brakes, etc. lack of maintenance is also an issue with the large trucking fleets. as to your car..if its a small leak you may be burning it off in your cat or its small enough that you dontnotice it. if you take the turbo off and look in the exhaust exit to your cat you may see evidence of oil going down there...like clean or wet spots or buned junk in one area of the pipe. but if its small stilli would just leave it. chances are you would like a bigger turbo anyhow that can take the harder abuse you put on your turbo. your turbo may just be overworked thats what youi have a turbo for anyhow. more power. if it were me i would: 1-see if my turbo can be rebuilt 2-evaluate what my turbo can handle withou trubble 3-decide if my turbo is still enough for me. if my answer is yes to all those i would rebuild it. if the answer is no to 1 but yes to 2 and 3, i would replace my turbo. if the answer is no to 3, i would run mine till it goes out but i would be saving for a new turbo and system up grades that will give me the power i want from a turbo