92 VX only getting 33mpg

[thewizard182]

----Edited to update progress as i check things, so people don't have to read the whole thread - last edit 1/31/08---

Started with 33mpg
Best tank so far with california ECU 43mpg
Swapped in Federal ECU and got 49 mpg

Background info:
90% highway driving, 100 miles a day
Average speed is 55-65mph
I don't drive like a hypermiler, but i do get passed alot
No CEL on
It is a california car, has the l00 ecu but has a 5-wire o2 sensor. Apparently this happens sometimes on the 92 models.

So far i have changed/tested:
Switched to VX rims and 175/70r13 tires losing a total of 44lbs
Compression tested 170-180 all cylinders
Replaced zfr5f-11 spark plugs with zfr4f-11
Front calipers not dragging
One of the rear drums had a little resistance, will check further
Checked O2 sensor, readings posted below
Checked and adjusted timing
Swapped in federal ecu

So far on the list to do is:
Get alignment
Check EGR (my egr ports on manifold look to be welded/sealed up, is that normal?)
Check vacuum

What else should i check?