I have a ScanGauge E fitted and that gives me instantaneous mpg indications, which are most enlightening.
It also displays the average for the current journey (I only reset the Honda on-board indication every time I fill up).
Temperature, traffic, gear selection, use of DFCO (
Deceleration
Fuel
Cut
Off), new tyres or worn tyres, all make a huge difference to mpg.
In slow moving traffic I find keeping in as high a gear as possible helps (moot since you have a CVT). On an A road or motorway I find an indicated 58 mph seems to return the best cruising mpg, but I find that rural roads (most of my out of town driving) return my best figures.
I also find that climbing in 5th, with lower rpm and higher throttle amounts, gives better figures than changing down to 4th or 3rd, with attendant higher revs and lighter throttle.
Yesterday I had an early morning trip into Edinburgh, with queues onto the Queensferry Crossing, queues to join the M8 and slow moving traffic for the remainder of my trip (how those that have to put up with that 5 days a week manage, I don't know). I then had 4 short 3 mile trips, in the city, with long queues, before a relatively leisurely return home, at lunch time. I still managed 51 mpg for the day (as against my recent 54 - 55 mpg for similar weekend journeys.
Being able to monitor mpg can make a huge difference to driving habits, if like me, you like to play the mpg game.