Originally Posted by Artmasterx
It would have been nice, but I didn't want to have too many options. I think that tracked/non-tracked may be important too, but probably a relatively small amount of people really track their cars.
Engine power mods would be a legitimate question... maybe I will add a comment to original post.
I was just talking with my indy mechanic on this very subject the other day when I took it in for an oil change. He says their experience indicates it is total engine time, rather than miles related. He said they are starting to recommend pro-active changes at around 60K miles if you do a lot of city driving in an E9x.