Predator Update - worthwhile?

[boathauler]

1)Predator U7185
2)Rev. 2.02
3)2005 GMC K2500, 6.6 LLY Duramax

First of all, I was wondering what improvements I'll see by sending the Predator back for an update to the current version. Is it worth the $100. ??

Secondly, I installed the tune along with an S&B intake and 4" "turbo-back" exhaust and always run the "enconomy" tune @ 65hp.
Originally picked up approx. 2 mpg. towing and non-towing (3 yrs.ago).
Noticed within the past year my economy has dropped 2-3mpg in both tow and non-tow checks. Performance has not changed.
Looking for suggestions........

[mikel]

The update allows you to datalog with the Predator, and updates the read and write processes.

If mileage has changed, something onthe truck has changed.

Fuel system, injectors, filters, turbo....but the tune can't change.