Whats the source of the numbers that say consumption would be reduced by 90%?
This is from GM’s observation of a reasonably large sample of real-world drivers, which found that 78% of miles driven would be within the Volt’s 40 mile electric range. The remaining 22% would be on the backup ICE generator, which would give roughly 50 MPG, a 50% reduction in consumption compared to the average 22 MPG vehicle on the road today. That gives you an 89% reduction in fuel consumption.
