Just got back from a trip to Cheshire, car not run in yet and still about 300 to go so my trip was driven nicely, not like I stole it.....!
We traveled 445 miles in total, filled up before we left and had 32miles of EV showing,
On return there were 0 EV miles showing.
While away we needed to fuel in order to have enough to get back and I returned the tank to full again this morning.
The car reckons we did 42 mpg and averaged 36mph according to my mpg link the actual mpg was 34.19 having used 59.17L of fuel and 32 miles of EV, remove the EV and it works out at 31.7mpg.
I think that goes to show what a very thirsty engine the car has, my previous Octavia on a similar trip would return 50+ mpg and that had a 1.4 petrol with DSG.
A similar trip in my wife's new MH Kona returned over 60mpg.
I reckon we will use hers for long trips and the HS for running around locally.
To be honest, long trips in a PHEV are never very economical.
I owned a VW PHEV for over four years and good fuel economy is better achieved when you can charge the battery as must as possible ( nightly ) and make many smaller trips in pure EV mode.
Slightly longer trips using EV mode for local low speed stuff, then saving the EV range for later in the journey.
Anything above 45 Mph and using EV mode will consumer the limited battery range very quickly.
Mixing the drive mode to the type of roads etc is very important.
When all of the EV power has gone, you have to remember that you are pulling around a very heavy car with what is a very small 1.5 Litre engine.
So, fuel economy is going to take a real bashing I am afraid !.
PHEV's fit into a certain usage case, repeated long journeys in a PHEV with no EV range remaining, is not going to provide you with good MPG returns.
Your example proves this theory to be correct.
In this situation, a diesel would have been more economical.
In my case, I would regularly see around 75 - 85 Mpg on a full tank of fuel over a few weeks.
The most I ever achieved on a full tank of fuel ( and charging almost every evening ) was correct average of 105 Mpg.
This was over about two to three weeks.
PHEV's really can be more economical than a straight ICE vehicle, but you have be charging almost every day.
Factoring in the premium price you pay for the car in the first place is also important.
I firmly believe most people ( like myself ) who wanted to try electric, will go PHEV first because of the fear of getting stranded with no electric range left in the HV battery and breaking down.
Therefore a PHEV just feels like a safer option, because it prevents range anxiety.
This is totally correct of course, but returns on economy is where you pay the price.
After four years of driving a PHEV with part EV, we decided to go full BEV IN 2019.
The same rules apply's here.
IF a BEV fits you usage case, then the running costs beats a PHEV completely hands down.
We managed to cover almost 20,000 miles ( with four lock down's in Wales ) in just over two years of ownership.
After two years of driving the BEV we then decided to upgrade to another BEV with much larger battery.
Giving us a range more comparable with a ICE model.