Since Sunday’s announcement in Shanghai of the Cadillac CT6 plug-in hybrid, there has been some interesting discussion and speculation about how far the car will go on a full charge of its battery and what sort of energy efficiency it will achieve. Cadillac and GM officials have declined to get specific about technical details beyond the limited information in the U.S. press release. However, the release on GM’s Chinese media site lists 37 miles.  Let’s take a look at where the EPA estimate will likely end up.

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