In the past, you could reasonably exclude energy because petroleum futures were subject to volatile upswings and downswings; supply was plentiful enough and demand was low enough that all sorts of factors (geopolitical and economic) could cause it to swing either way.
However, I don't think you can reasonably make that case anymore; supply is sufficiently tight and demand is sufficiently high that it is quite safe to assume we will not see $10-20 oil anymore. We still need to account of speculation, but it seems like there should be some way to amoratize future gains and losses over a sufficient period of time to produce some sort of energy "constant" that adjusts the CPI upwards.
However, I don't think you can reasonably make that case anymore; supply is sufficiently tight and demand is sufficiently high that it is quite safe to assume we will not see $10-20 oil anymore. We still need to account of speculation, but it seems like there should be some way to amoratize future gains and losses over a sufficient period of time to produce some sort of energy "constant" that adjusts the CPI upwards.

It's about as useful as this chocolate teapot I had made.
Why do you think gold and oil (and look at home prices) have doubled or tripled in two years? Lack of supply? Try a dollar that is so inflated nobody wants it. Your measure of inflation apparently revolves around Chinese manufactured consumer commodity items, which have become quite cheap. The ONLY thing keeping inflation as low as it is.