I really want to know if this is working or not.....im not ranting about gas mileage per say, but it is in the back of my head. I bought the Jeep knowing it would suck but
As many of you probably know, I just bought myself a 2005 Grand Cherokee Limited.
Mods right now include, 2" Terraflex Lift, 265/70-17 BFG All Terrains, Magnaflow Cat-Back Exhaust and CAI.
I know the HEMI's are supposed to have 5w-20 oil, however the previous owner did not tell me what oil he ran in the Jeep. He has this light wired up that turns on whenever MDS kicks in, and well ....I've only seen it light up twice.
I drove on the highway, going 60-65 mph this last week for about 50 miles and only got about 14.5 mpg, once again, the light never kicked on.
On the way home, I took another road and drove 50-55 mph and it was on for maybe 2 minutes during the whole hour drive. Avg- 15.2 mpg
I KNOW, Im driving a Jeep and Jeep and gas mileage never go together. I would be fine with 13/17 but, my avg of 10.4 city and 14 highway driving slow as can be EVERYWHERE is just disappointing.
1. Sparkplug change, to the Champion coppers you all talk about
2. EGR Replacement
3. Ive already cleaned the TB