Not impressed with the mpg, spent a couple of days at our caravan, a journey from the West Midlands to north Wales with a good mix of urban, motorway, 70mph A roads, 60mph A roads and up and down hills. The car display said 42.6 mpg, I filled the car up before leaving and again on return, 24.17 litres for 216.6 miles, so 216.6 miles divided by 5.32 gallons equals 40.71 mpg so the car display is not faulty as I at first thought it was.
“Hybrid” to use the term loosly, don’t work well at higher speeds due to the reliance of the ICE, where the engine provides more power and efficiency (if it wasn’t for the weight of PHEV’s) for sustained acceleration.
In Hybrid (HEV mode) the battery is used to assist acceleration and low speed conditions such as in the city. As such hybrid cars are more efficient when driving at lower speed and in stop start conditions, which allow a Hybrid to enter EV mode frequently and if you drove in Hybrid (HEV mode) locally 50mpg would be easy to acheive.
Rather than using all your EV range at 60/70mph, I would switch to HEV on these faster roads and switch to EV on slow speed roads or use the EV range for tootling around town at your caravan and make sure you return home, with no EV range left.
If 70+% of your use is on faster roads, you won’t see the return you were hoping for, as you can see throughout the thread kezo vs @Glos-Guy journeys and economy.