The problem is also that oil becomes more expensive along an exponential curve. We'd have to see ~4% per year efficiency increase in the entire economy, every single year.
That's not just finding more efficient systems. That's inventing them, engineering them, building them, replacing existing systems, and the ROI of the ENTIRE process (including the activity needed for said replacement) needs to be at least 4% of the size of the economy. Every year. Even the renewable technologies we have, like solar, fail this test because of their production energy costs.
When was the last year we saw 1% improvement in the economy ? Right.