I have a 2019 LX PHEV here in California with about 7500 miles.
What I observed in my previous long trips (~400 miles) in HEV mode: car tries to maintain the same EV mileage along the road, which includes using EV when too much is regenerated.
What I saw:
- the car is cruising at constant speed on ICE
- after a couple of dozens miles, the ICE stop, the car glides in EV for few minutes
- and then ICE comes back and cycle start again.
So I conclude that cruising with ICE on (never in "charge" on the meter), the car still grab some EV miles and re-use time to time as it considers it as a bonus to decrease your overall MPG.
I never had to use Sport mode to generate EV miles.
I'm just considering that normal HEV management is handling my EV miles saving, maximizing the MPG of the HEV mode in the meantime.
Anyway, my average with this car on long trips ( > 200 miles, HEV mode, no EV mode) varies between a minimum of 47mpg to > 65mpg!
Difficult to get close to that with any gas-only car, even with a small one.
Therefore I'm assuming that some EV regeneration-compensation are done even while cruising in HEV mode.
The job done on this car for the energy management is just amazing.
Kia Niro PHEV 2019 Gravity Blue.