[aerohead]

Your car is so 'worthy', I went ahead and crunched a second set of numbers.
The assumptions:
1) Af= 23.7836-sq-ft ( 2.2095 m-squared )[ I used the same proportion of net area, to gross area as Don Sherman did with the Gen-III Prius in 'Drag Queens.'
2) Cd 0.26.
3) OEM tires.
4) 3,232- pounds test weight.
5) 95.333 feet/second ( 65-mph ).
6) 43.3-mpg @ 65-mph, with AC 'ON'.
7) 1.5011-gallons/hour ( @ 111,836 Btu/gallon REGULAR Unleaded E10 )
8) 167,883.14 Btu/hour (gross )
9) divided by 2546 = 65.9399- gross horsepower equivalent
10) X 0.40 ( thermal efficiency ) = 26.3759 brake horsepower/hour
11) X 0.978 ( accessory losses ) = 25.7957-hp
12) X 0.8771 ( CVT mechanical efficiency ) = 22.6254-hp Road Load
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13) 11.56782-hp aero= 95.333/550 lb-ft/sec ( 0.5 X 0.002375 X 0.26 X 23.783 X 96.333-squared )
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14) 22.6254-hp - 11.5678-hp aero = 11.0575-hp rolling resistance ( a constant )
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15) 65-miles/hour divided by 60-mpg = 1.08333-gallons/ hour
16) X 111,836 = 121,155 Btu / hour
17) divided by 2546 Btu/ hp = 47.5865 hp-gross
18) X 0.40 thermal efficiency = 19.03461-brake horsepower-hour
19) X 0.978 ( accessory losses ) = 18.6158 hp
20) X 0.8771 ( CVT efficiency ) = 16.3279-hp Road Load @ 65-mph ( modified )
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21) 16.3279 -hp - 11.0575-hp rolling resistance ( a constant ) = 5.2703-hp aero power ( streamlined ).
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22) 5.2703-hp = 95.333/ 550 [ 0.5 X 0.002375 X 23.783 X 99.333-squared X Cd ( unknown )]
23) 30.406 ( after algebra ) = ( 256.6833 X Cd ) after algebra
24 ) 30.406 / 256.6833 = Cd (unknown ) = Cd 0.1184 ( if all mpg gain was strictly attributed to aerodynamics )