With the warm weather here, I wanted to play more with AVCS. Previous best highway MPG was 26.9mpg with this tune
plus Closed loop to Open Delay disabled
Compare that to stock map:
This increased the gas mileage to 29.60mpg
with AC running full blast! Please note this is actual MPG (not gauge) done by calculating miles driven divided by gallons filled up. I also account for speedometer inaccuracies (mine is off by -2%). Without accounting for that, gas mileage would actually be 30.20mpg. I'm surprised it's this high with closed loop to open loop disabled, usually that will lead to worse gas mileage because you hit rich AFR's instantly instead of having a buffer of leaness when you add throttle.