Maybe the last question.....what about the Diablo towing tune? In my case, would you recommend the 93 tune or the towing tune? What octane does the towing tune require?

I have read a few posts over the "super reliable internet" saying the canned 87 tune won't really make a difference vs the stock tuning as it is already tuned for that at the factory. What changes are made with the 87 perf tune? or do I really need to bump up to 93 to see much of a difference.

I just bought the Predator 2 for tuning my truck to assist in towing my 37' 7800lb camper. I'm not sure the best tune to go with and would appreciate any advice or suggestions. Also the reasons for your choices would assist me greatly. Also some fuel economy while towing wouldn't hurt my feelings.