But surely the electric must be taken into account ie, 32 miles on ev equivalent of 3.5 ltrs of petrol therefore 1.77 gallons for 100 miles = 56.4 mpg.
Hi Jeff , that all depends on the cost of your electric.
If i charge the car at night and use octopus go faster its 5.5p per kw. This will be increasing soon to 7.5p per kw. If my memory serves me right , the PHEV has approx 13kw of usage battery for the 32 miles ( i know i get more than this range but lets say it 32)
So at 5.5p ( x13) = 71.5 p for 32 miles. ( 2.2p a mile)
At the 7.5p rate that goes up to 97.5p ( 3 p a mile)
At 30p rate that goes up to £3.90 ( 12p a mile)
A gallon of petrol is 1.68 per litre ( x 4.5 for a gallon) = £7.56
At these prices
If you car does 30mpg ( 25p a mile)
If your car does 40 mpg ( 19p a mile)
If your car does 50 mpg ( 15p a mile)
So in theory for a price of a gallon , how many full charges can i get at my electricity rate
so £7.56 / 71.5 p = 10.5
so in theory if i do not drive over 32 miles in any given trip then32 x 10.5 will give me the amount of ev milage i can do for the equivalent of a gallon of petrol = 338 miles
If i do it for the soon to be higher charge its £7.56 / 97.5p = 7.7
So again 32 x 7.7 = 248 equivalent miles
If i do it for the 30p rate £7.56/ 3.9 = 1.93
So again 32 x 1.9 = 62 equivalent miles.
Again in real world conditions its a hybrid , so at some stage you will use the engine ( put the heating on , drive for more than 32 miles etc) , but the more you just use the EV mode ( by manually switching to it ) the cheaper it will get.
I mentioned before ( on another thread) in January.
I posted one when i first got it and went down the route of trying to cost out ( pence per mile) the phev against an ICE car. It was good to do , but i remember Greebo12 saying i was over complicating things and to just see how much petrol you put in. I must admit i did not quite see that point of view at the time , and its just now after knowing more about the car and how to run it , i can see what they meant.
So for example we filled up the tank a couple of weeks just before the dreaded UK petrol shortage happened in September in the UK ( how lucky was that ).
Just before christmas we filled it up again ( even though there was 50 odd miles left) so thats 2 tanks.
We have added a 3rd tank of petrol since my reply in January so thats 3 tanks in 6 months ( which isnt too bad ) the rest of the time we just charged it overnight ( on cheap octopus go ) and used it in EV mode.
I hope that helps