same reaction the 30 seems right for 70 to 74 mph with cruise set and flat ground, I have wondered the same thing so I set the cc on flat ground (easy to find in ohio) and then engage ac no change ... maybe 1 mpg this is with the instant mpg feature . have no clue why the big drop. temo is a lil higher with ac on , have never seen an 11 deg jump but never really checked
Fuel mileage help
I didn't really think about it too much till the other day when I posted about my fuel mileage. Heres my issue. Today driving into work I averaged 35.3mpg with no a/c on. When I turn on my a/c I get about 18mpg. Is this normal? I just contributed it to being a 4cyl. Also with no a/c on the car runs between 198-202 degrees. With the a/c on it runs from 207-215 degrees. Any thoughts?
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