So I've made this trip several times now with conditions pretty darn equal(temp, wind, tire pressure, 87 octane, etc.). Straight shot across the state all highway using cruise control @ 68mph. Before my CAI I just had a drop in K&N filter and Magnaflow SISO cat back and got betwwen 17.9-18.6 MPG.

Now I put the Airaid CAI on the truck about 3 months ago this time I got 16.3-17.1 MPG. Nothing different about this trip than the others. The CAI only seems to have helped pick up MPG in city driving I was averaging 14.3-14.5 MPG now I get 15.1-15.3 MPG.

Anyone else have an usual experience with their CAI system?

 

It shouldn't make much difference either way. They don't flow enough extra air over the stock set-up to lean out the mixture. Perhaps you got some gas with 10% ethanol. That will drop it 1 to 2 mpg.

Not sure about the 09-up, but if you have a Hemi, it is probably recommended in the owners manual to run 89 octane fuel. It does for my 08.

 

i'd actually love to jump on with you and say I didnt notice anything positive from mine. I put it in and immediately noticed worse numbers, but thought to myself its a gas 2500, what do I expect. but since your on the topic, yea I didnt see any improvements, and I swear I loss some higher rpm power, she doesnt seem to pull off the line as quick