[locolobo]

I have 57k miles now, bought the car with 33k two years ago and installed the Ecotune program. It wasn't exhibiting any noticeable problems before or since. This past summer, I had to take the intake off to replace a bad glow plug controller. So while I had it apart I inspected everything. There was some light CBU, maybe 1mm, especially around the swirl flaps. I cleaned everything thoroughly. I am running 5% biodiesel all the time and Power Service cetane boost, which should help to reduce soot and provide more complete combustion.