Thanks for the ideas everyone. As far as coolant operating temperatures goes, The coolant temp is always in the midrange. I've never gotten a tstat stuck open code so I think we can rule that out. Green Dragon, I'm sure that my foot has been slightly heavier. But, it has been in the past, and hasn't gone this low. Interesting thing happened. My adaptions were freaking out after I installed my headers. I also had codes stored for the missing post cat sensors. I figured out that when you do the Euro 2 flash, the post cat 02's and air pump need to be unplugged. Otherwise, the system thinks it's equipped. I simply reflashed the DME and reset adaptions. Which fixed the error codes and the values jumping all over the place. I didn't really notice any big change in the low end torque after the mufflers were connected. Maybe I need those 3.64 diffs For now, I'm going to remove my Thule ski rack, top up the tires and get some BP 93 since I need gas anyways. I'll let you know how it goes. Also, I your inbox is full.

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2004 X5 3.0 6 Speed MT
Build Date - 09/03
156K Alpine White / Black
Premium & Cold Weather Packs, Nav,
Tons of lighting mods, 4.8is Exhaust, Headers, Eibach Springs, OEM 87's, Custom DME Tune, OEM Hitch.

2005 X3 3.0i - 100K - Blue water Metallic / Black

2005 X5 3.0i - 140K - Alpine White / Hellbeige 2