Here's something curious I haven't seen discussed yet. Looking at the 70D and 85D on the EPA fuel economy site, as expected the 85D gets a somewhat lower city MPGe rating then the 70D, 95 vs 101 to be precise. However, for some reason it has a better highway rating – 106 versus 102. The lower city rating is not surprising, the 85D must be heavier since it's carrying more batteries. However, I'm curious why the highway rating would be better. I had the impression the two cars were essentially identical other than their battery packs.