Need some Info on a Gryphon

[dave-m]

Originally Posted by Longshot270

There was a member who found that the canned tow tune improved his highway mileage, even compared to the the performance tune. I think he was running 35s.

I can agree.

I went from stock 20's to 325/60/20's (a wee bit bigger than 35x12.50) and picked up the Gryphon at the same time. I'm running the canned tow tune until my custom tune is done and my mileage is pretty much the same as it's been since the truck was new. And I'm talking miles per tank, not what the readout says. I reset my odometer at every fill, and have done since I bought the truck so I keep a pretty good eye on it.

The caveat would be that most of my weekly driving is on the highway. Stop and go traffic really kicks the crap out of mileage.