Mid-fuel level tune?

[2012silverado6.2l]

Hey, I'm new to this whole tuning scene, but bought an Intune recently. I have a 2012 silverado with the 6.2 liter motor. I'm running the Diablo preset now, and am happy with the results so far. Feels like a new truck. Wondering if I can run 89 octane with the Diablo tune or if there is a way to run 89 with similar results?

[gmtruck]

I think you should be running 93 when tuning with the diablo tune.

[garrett]

The diablo tune is for 93 octane, choose the tune that matches the gas octane you use

[06MonteSS]

actually, on trucks, the Diablo Tune is for 91 octane gas, or higher...

if you use 87/89 octane gas in the truck, then use the 87 Octane Tune...

if you use 91 octane gas or higher, then use the Diablo Tune...