"ICE" vehicles all generate their power on demand. ICE vehicles are all individually their own power generation plant.
Battery cars run on energetic "credit", nothing but stored electrons. Politically, this it's more a subscrption to energy, without the ability to generate it. This is the real political will behind battery cars, and the push binding (forcing by incremental legistation over a long term) consumer energy usage to the electrical grid.
ICE commuter vehicle 20-30% thermal efficiency
combined cycle natural gas 60% efficiency
combustion only natural gas 35-40% efficiency
ICE efficiencies really haven't been that had since the 80's, really. Modern engines are much more efficient now, and that's not including the times when they're 'combined cycle' generation plants themselves, such as when using cabin heating. Consumer diesel engines are achieivng over 40% thermal efficiency. High efficiency consumer Gasoline engines not far behind. Large industrial ICE can achieve even greater TE due to their scale.
a solar panel lasts 25 years with only negligible degradation
In theory. Real life factors ensure that this isn't much of a reality. Solar efficiency varies, they're loaded with heavy metals and again, are typically destroyed by some other factor than degredtion.
in output capacity. oil is renewable only to the extent that rate of usage does not exceed rate of regeneration.
Oil's the best. No one can credibly prove what usage exceeds production, as no one can credibly prove the rate of production, since these morons can't even agree on what oil really is.
But I'll tell you what, vegetation across the globe loves our combustion!
this is a pretty good point