Ok I think I need a custom tune, dtune mpg went to hell

[2010gmc]

I put in the diablo tune and i like the way it feels but my mpgs fell off from 20 with the 87 tune down to 16 ,im going to put back in the 87 tune but i installed the cai at same time as dtune and was wondering if this is normal for dtune to consume this much more gas .

[mikel]

The CAI has definitely skewed the fuel trims, time to do some logging and get it dialed in.

[2010gmc]

OK ill do that