For my own curiosity I completed the gasoline end of the math above. Hopefully I didn't botch any of it. If so, please correct me:
According to Wikipedia¹ the energy of gasoline is ≈11.8 kWh/kg at a density of ≈0.74 kg/l, giving us 8.7 kWh/l. For California, using the $0.85/l price, we get $0.10/kWh (rounded from $0.09770) for gasoline. Norway, at $2.45/l, gives us $0.28/kWh.