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Here is the actual computed (not DIC) mileage results from a road trip (interstates) from Colorado to Washington State and return. 2010 Equinox AWD I4 in "ECO" mode.
Speed was at or 5 mph above posted speed of 65 in Oregon to 80 in southern Utah.
23 mpg Colorado Springs to Laramie
21 mpg Laramie to Evanston Had Strong Headwinds
27 mpg Evanston to Boise Same speed no wind
25 mpg Boise to Portland
25 mpg Portland to Yakima
25 mpg Yakima to Boise Hills
24 mpg Boise to Provo Heavy Traffic
26 mpg Provo to Mesquite 80 to 85 mph
22 mpg Mesquite to Flagstaff Strong Headwinds
25 mpg Albuquerque to Colorado Springs
Conclusion: About what I expected, 80 to 85 kept it in 6th gear, so mileage improved. At all of the other speeds, especialy 65 it would shift into 5th at the slightest incline. I have gotten 30 mpg but it was at 45 to 55 mph on a sightseeing two lane road.
PS: The DIC shows about 1 1/2 to 2 mpg higher than computed mileage.
Speed was at or 5 mph above posted speed of 65 in Oregon to 80 in southern Utah.
23 mpg Colorado Springs to Laramie
21 mpg Laramie to Evanston Had Strong Headwinds
27 mpg Evanston to Boise Same speed no wind
25 mpg Boise to Portland
25 mpg Portland to Yakima
25 mpg Yakima to Boise Hills
24 mpg Boise to Provo Heavy Traffic
26 mpg Provo to Mesquite 80 to 85 mph
22 mpg Mesquite to Flagstaff Strong Headwinds
25 mpg Albuquerque to Colorado Springs
Conclusion: About what I expected, 80 to 85 kept it in 6th gear, so mileage improved. At all of the other speeds, especialy 65 it would shift into 5th at the slightest incline. I have gotten 30 mpg but it was at 45 to 55 mph on a sightseeing two lane road.
PS: The DIC shows about 1 1/2 to 2 mpg higher than computed mileage.