I don't know about the 2.5 but I can tell you the most inportant change on my 3.0 is that the stick shift has become so much easier to use and is realy smooth now. I have 5400 on it now, and I realy can not tell you when I became aware of it, as I think it is a progressive thing. This is just one fine vehicle, and I am now looking forward to finding out how good it will be in the winter snow here in Steamboat Springs Colorado. The heating system on auto seems to be doing a great job so far, but I am anxious to see how it is when it drops off to -20 F deg. Happy driving, Chuck Abbott