[aerohead]

The 1990 Pontiac Trans Sport minivan was Cd 0.30.
The 1991 GM HX3 concept van was Cd 0.258.
NASA's 1977 truncated boat-tail van was Cd 0.242.
Coventry University was able to get the van-like, 'Kamm-back' 1999 Audi A2, from Cd 0.288, down to Cd 0.204.
The van-like 2008 Mercedes-Benz Bionic Boxfish would be approx. Cd 0.20 with a set of Tesla-esque mirrors.
The van-like, 1985 Renault Vesta-II, with an extra side mirror would be approx. Cd 0.191.
These are some of the vehicles I benchmarked for AeroStealth's Chevy Bolt modifications. We're targeting Cd 0.21, from an OEM Cd 0.308. I don't see any technological impediments. We're looking for 300-miles range, HWY.