I think the reason automatic is more efficient is you'll often get more gears, maybe like 12, so it stays closer to the most efficient RPM. And it'll shift way

I think the reason automatic is more efficient is you'll often get more gears, maybe like 12, so it stays closer to the most efficient RPM. And it'll shift way up just cause you let off the gas for a second, so engine-braking is minimal. Stickshift drivers can maaybe do that, probably not. I can see those two things saving 4 MPG. Also have no idea if the EPA tests account for average stickshift driving habits. And all that is without considering hybrid tech.