Rolling resistance of tires is mostly dictated by the tire compound and pressure.I've heard people say you'll get better Mileage with the Factory tires that's why the Tread Depth isn't as deep as other Tires. The Manufactures do that for better Mileage Ratings. My Dad had i forget what Original Tires on his 2005 Ford Five Hundred. But he switched to IIRC BFG Tires of the same size and lost like 2 mpg in Fuel Mileage.
I race bikes (the pedal kind) competitively and the rolling resistance of tires + optimum tire pressure has become a pretty big deal in the past 10 years, often in ways that seem counterintuitive. Larger tires at lower pressure roll faster than small tires at high pressure in the real world, and smooth tires don't always roll faster than tires with knobs. There are fairly scientific sites just to test the rolling resistance of tires, and calculate the optimum tire pressure.
I only mention all that because rolling resistance and tire pressure also affects car tires, and I am honestly kinda surprised there's not an all in one site to test the rolling resistance of consumer car tires, and help people understand what the best pressure is for the right balance of handling / ride / MPG. When you consider all the crazy things manufacturers do just to eek out a fraction of a MPG for the EPA, it's kinda crazy to turn around and potentially throw away 10% or more of your fuel economy on the wrong tire setup.
Sponsored