My mod's last weekend seem to be paying off this week, despite some strong winds. I credit the WAI. But WAI is causing me to relearn my radiator-block vs ambient-temp settings.
The Scanguage is reporting 1-2 mpg increase on the 20 mpg hills, and I'm watching the tank average creep up every day. I've been able to maintain my average this winter, but hadn't seen any gains until now. I'm very pleased.