Took the beast in for 75,000 K service and decided to do a few more things above and beyond the call of duty. One of those was valve cover gaskets (just damp)and cam chain tensioners. As often happens no good deed goes unpunished. They put the car back together and was running beautifully. Next morning oil on the floor. So upon inspection camshaft seal was leaking. Redid the seal and still leaking. Now the interesting/strange part. After another inspection shop is saying there is a small groove worn into the portion of the cam that fits into the cam seal and is causing the leak. So options seem to be new cam, let it leak or a fix the shop is calling a "speedy Sleeve" Anyone on the board have experience with these? Also full disclosure my car had 0 oil leaks when it went under the knife. So of course my suspicion meter starts jumping. Any chance the cam could have been damaged during the tensioner replacement. Any second or third opinions on my options would be appreciated by those of you so wise in the ways of the wrench. Thanks