I have not seen my Auto Enhanced Fico since beginning of 2010. Recently as of today you can see my TU Fico below is 660 and no baddies since BK 13 5-2007.
EQ still is showing the 2 Charge offs that I just got removed on TU.
But when I bought my car back in 2010 my Auto Enhanced was about 150 points lower then my regular Fico at the time register 647 EQ.
Anyone other then Credit Unions not pull Auto Enhanced? I actually think Car Max does not but not for sure.
I really lean towards refinancing my car I bought in 2010 because it's down to like $9k but I have been unable to for the last year... I would rather go trade it in and get a nicer newer car with more options if I'm not able to refi but can purchase newer for almost same payment based on interest rate coming down a lot.
Thoughts/Ideas/Suggestions! 
