Oh yes it is.
I admit you are clever at using a mass of astoundingly erudite figures, I don't agree with any of them obviously.
I spent 2 days in an oil refinery in West Pembrokshire, was given the figures by the staff as I stood next to their own sub station which was fed by their own string of pylons coming from the nearest power station. The quote I remember 'We use the same amount of electricity as a town of 250,000 people.'
But let us leave that aside, your argument really collapses when you say ' it's generally reckoned that the energy cost of extracting oil and the refining it is about 20% of the total energy content.'
Generally reckoned, by who I wonder? Why are the exact figures not known? In who's interest is it to keep these figures obscured. Not mine, not the general public or even the government.
I question those figures very strongly, the most reliable reports I have come across are from the Royal Institute of Engineers who came up with the estimated figures I posted.
Then your decision to use the wretched G-Wizz as an example of a relevant electric car reveals the true bias of your arguments, I will do the same.
I'm reading about the 1969 Dodge Challenger, the engine is 15% efficient, it does 7 miles to the gallon, I am using that as a fair representation of a fossil burning car. Oh wait, is that not fair, has the technology moved on since then? Oh, well, I'll ignore that.
2 years ago I drove a Toyota RAV E4 in California, a fully electric, battery powered car. It had driven over 100,000 miles on the same battery pack, in all that time the owner, Paul Scott, had replaced one shock absorber. Not even the brake pads.
Fossi burning cars use out dated, steam age technology that has been proved beyond all doubt to be damaging, wasteful and inefficient. They are totally reliant on an unreliable energy source that is going to run out, no matter what figures you throw around, they don't add up.
After sitting in a traffic jam for a couple of hours the other day, probably 10,000 cars, crawling along at 2 mph. All their engines churning away, a massive and pointless waste of energy. If all those cars had been electric, the gains in efficiency and lower energy use would be off the scale.
And lastly, it is technically possible to charge an electric car with renewable or carbon zero electricity, not matter how you skew and obfuscate the figures. It's not easy, it will take time, but it is possible. You cannot and will never be able do that with a car that relies on drill and burn fuel.