Heres whats going on, Im only getting on the DIC 11.7 for one, Ive done mostly city driving and have gone 107 miles and used just under 3/4 of a FULL tank. (There isnt much heavy throttle, honestly)

Thats extremely bad, I have a slight exhaust leak seeing how its welded mostly anyway w/ ZZP flex.

Ive replaced:
-Plugs with AL 104 @.055
-New ZZP 10.3 mm wires
-fuel filter
-PCV
-Front o2 sensor
-Fully syn trans & motor oil
-All fresh coolant, brake and PS fluid

It has a tune on it, 40* of cruise timing. Its not a very accurate tune seeing how the MAF tables are still stock on this 3.4 set up.

Black arrow mentioned to me about the coolant temp sensor could be acting up as a silent killer with no DTCs, Ill check my ECT's with my laptop later this weekend to see if theyre accurate.

I did get a DTC ECT sensor high voltage, then it went away.

Only mods that could affect MPGs really: 180* Tstat & EGR delete.

Any powertuner scans? I wanna see if your fuel trims are pegged positive.
What tuning have you done? Anything with the MAF or injector tables?
When in doubt, upload the stock tune and see what happens.

BINGO!

unless the trims are maxed out pos/neg, poor tune wouldn't cause that kind of mpg. contributing factor, yes.

And one shouldn't go by DIC either for calculations

I have 40* of timing when cruising and I can get up to 38 mpg on the highway doing 75 mph. Mostly it is around 34 mpg but I have seen upwards of 38 on some days.

Send me your tune!

Overkill in-car tune FTW.

Thats crazy MPG's Randall .. i've been pleased averaging closer to 18 pure city driving.

Mid 30s on a stock tune isn't uncommon.

What are your RPMs when cruising around?

Thats my average around NYC.

I'll be digging for more exhaust leaks later, it sounds like it's getting worse and ticking louder

Exactly what I was thinking.

20GTP02, Im not just going by the DIC, look at the numbers in general 3/4 tank in a little over 100 miles. Terrible