What is your highway posted limit and average traffic speed? For example 55/65? Go accelerate to 65, then apply light throttle to assist in coasting down to 55 or even 50 depending on traffic and repeat. This is what the lean burn guys do to get triple digit mpg. Of course they hover around 50 mph.
I know people say the car exits use of the electric motor and goes to gas at certain speeds, but it does cut off the engine under light load at and above highway speeds.
May help to use the rpm feature and start setting rpm limits for gas usage when accelerating. The insight has a big honking one in the center of the dash and I try to stay below 2500 or just before vtec kicks in yo.
