Read this on a motorcycle forum I visit: " Rotella has a lot of modifiers for carbon particulates that you get in a diesal. Its crap. If you don't want to blow up your engine by excessive turbo pressure you'll get rid of it." Being the nimrod I am with oil topics how would you answer this. Rotella seems to be an excellant product I use not only in my thumper but pickup as well. Thanks and have a good one!