Keep it. Why sell it if you have it setup the way you want it. Nice caddy btw. I'm about to have my wheels powder coated pearl white! Took me awhile to find it.
It made a difference in my mpg. Local 13 mpg to 14.7. Also sounds like a 4 barrel when you hit the gas. I can feel a little difference once you get upto 30 mph and kick it down.
Local I average 14.7 mpg since I added the airaid Jr and AEM dry filter. I was getting 13 mpg local and 16.7 highway. I still haven't been on any trips since the install of the airaid. Next month im planning on my 100k tune up, plugs and wires.
When I bought my 03 escalade back in November I ran a test filling up each time with different grades. I tried 93, 89 and 87. I got better mpg out of 87. I've put close to 5k miles on it running 87 with no problems.
I have one, I really like it, saves a trip to AutoZone or the garage when the light comes on. I use the software Torque Pro, I think it was 5.00. I'll have to get the name brand of the plug tomorrow when I go out in the morning.
North Carolina has emissions and safety checks. As long as your engine light it off your good to go, my dads burb looks like a Christmas tree but still passes.lol
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