The biggest oil companies in the world have calculated that few, if any, of today's drivers will see electric cars outnumber gasoline and diesel models in their lifetimes.

While politicians and green lobby groups insist the future of transport is electric, in the past two months BP and Exxon have released data which points to electric cars making up only 4-5 percent of all cars globally in 20-30 years.

Meanwhile some governments are targeting as much as a 60 percent market share for electric vehicles over a similar period.

The oil company forecasts may appear self-serving, but if they are widely accepted could provoke a policy shift that offers greater incentives for electric cars to end our addiction to oil.