6.4 running xrt pro/now want to monitor
i'm running the xrt pro on default hot and tune it down to mild for towing. i love the mpg gain (can get 19) unloaded on the hwy doing 68 mph (3.73 rear end). i hate the low mpg's when towing on the mild tune (11 mpg). i know it would get better mpg on hot. one time i towed my boat on hot and got 14.5 mpg increasing in elevation; and then got 12 mpg on mild on the trip back home. as you might expect i am real tempted to tow the 5k# rv on hot.
what's the easiest, cheapest, best option for me to monitor parameters. don't want to tow on hot blind.