[SentraSE-R]

Summing it up:
A1 (control) test 31 mph CC = IAT 73º, ambient 51-55º, 53.3 mpg
B1 (WAI) test 31 mph CC = IAT 100º, ambient 60º, 54.2 mpg
A2 (control) test 31 mph CC = IAT 76º, ambient 65º, 54.3 mpg
B2 (WAI) test 31 mph CC = IAT 100-103º, ambient 70º, 54.8 mpg

A3 (control) test P&G = IAT 73º, ambient 65º, 64.7 mpg
B3 (WAI) test P&G = IAT 91º, ambient 70º, 65.8 mpg

All tests done yesterday on dry roads, 0-5 mph breeze, tires inflated to max sidewall cold, cruise control (CC) for the main tests. Photos of my WAI and test discussion are on gassavers. Net result, no significant improvement.

It's possible to look at these same figures, and argue the WAI does give a fairly consistent 1 mpg or 2% FE increase. The fly in the ointment is the B1-A2 overlap, and the consistent rise with increasing ambient temperature.

Bottom line: A1 - B1 - A2 all showed 19.3 miles traveled on .36 gal. fuel, and B2 showed 19.3 miles on .35 gal. fuel. There was essentially no measurable FE difference from having the WAI in place.