I was wondering whether you had any experience in using the B-mode in a more recent Prius. I just got a 2018 Prius Eco, and I´m not sure under what circumstances the B-mode helps to conserve fuel. Is it only on extended downhill sections, or can it be used as a regular setting for the city or highway?
I do not. But you should consider that any energy coming out of that battery will be replaced by burning fuel unless it is a plug-in hybrid. Given that, I don't see a battery only mode saving much at all. If you're changing parking spots, or in a slow line getting out of a parking lot, it might help conserve a little.
Updated on March 12, 2018
By Dan Harmon