I bought my new to me 2002 F250 CC SRW with the 7.3 last weekend. It has 122000 miles on it so far. Previous owner had this Superchips Micro Tuner and had used it in Tow Safe Mode when he pulled his fifth wheel camper. I know from reading thus far that this is not the greatest tuner on the market but it came with the truck and at this time I don't have plans of doing anything else to the truck or getting another tuner/chip. My question is would I be better running it in the stock mode all of the time and only using the tow safe mode for when I pull my trailers, or will I get better mpg with it in tow safe mode? It also has hi performance mode, but I don't plan on using that either. As of right now, the rest of the truck is stock and I don't have any other EGT gauges or anything to do any monitoring. Thanks in advance for your opinions.