But most parts houses list the extra T. Even online I sometimes catch myself looking past my model in the list and having to come back to it because it says 300CDT. But it's not a hassle, just a fact of life. As far as I'm concerned, anyone who owns one, can call it what they like. Afterall, it's their car. I get more confused when I read posts that say something like "I just changed to oil on Sherry, and next week Dolly is getting a new transmission".