08 GMC Sierra 1500 6.0L
I recently purchased the trinity and put the MPG boost tune on it to drive to my job 300 miles away. After the trip I lost about .5MPG over my previous drives. 12.9MPG with the MPG boost opposed to 13.5 stock.
What can I do to improve the MPG tune I will be starting a new job in 2 weeks where I will be driving 200 miles a day would love to see some better MPG.