Got a new personal best yesterday of over 29 MPG on a short trip of 18 miles in Eco mode under ideal highway conditions. All stock with 20 inch factory wheels and roof rack crossbars. The LC could smoothly maintain cruising speed of 60MPH at 1,500 RPMs and 65 MPH at about 1,700 RPMs.
Overall, not too much of a compromise when it comes to driving style. Just needed to stay conscious of when and how to use the battery assist to nudge it along without revving up RPMS. So relied primarily on the tachometer rather than the speedometer.
This experiment is consistent with the measured results I have seen at the gas pump. About 21 MPG city and 25 MPG highway and a single tank range of about 350 miles for mixed use driving.
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