I think the main thing to keep in mind is what the pcm is doing during that set of driving conditons. Its gonna be in Closed Loop and the main focus of that is to provide 14.7 to 1.00
I have seen some say geting the inj time events optimized really helps with gas milage
Since my car is a weekend toy only, I don't pay much attention to how much gas it burns
other than
When I push a bit ..............
those 30's do get thirsty for that $2.85 a gallon liquid gold
Grady