Hi I'm new to this forum and hope to get some good info on what I will do with my 2002 Tahoe. I already put in ac delco iridium spark plugs, im working on a diablo trinity system, and trying to find a good CAI and whether or not it will work for better fuel mileage. I use my tahoe for my business for Pilot/Escort and I put a lot of miles on it, so I'm looking at all the ways to increase my MPG. I also use RP oil and am loving it.