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Frankly, your car is reasonably light and quite fuel efficient to begin with, so these differences could be very hard to measure. I am inclined to say that you should be targeting tread life per dollar rather than rolling resistance. Most harder compound all season tires are going to be around 0.008 anyways, the lower ones going down to 0.006. Soft performance rubber will go up to the 0.013 range for the more extreme tires, but typically around 0.009-0.011. Offroad mud tires with thick thread blocks will be horrible at ~0.02 ish.
I also wouldn't run 60psi if the sidewall says 44, that seems like too much...higher pressure only helps to the extent that it avoids sidewall flex, so the rolling resistance approaches some lower limit as you increase pressure.
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