If you're on the highway a lot, without a lot of stopping and starting (which is apparently part of the trick required to recharge your hybrid), your Hybrid isn't going to show much improvement over a "regular" car, since you will mostly be running on the conventional part of the engine.
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Your lack of planning does not constitute an emergency on my part...unless you're my manager...or a director and above...or a really loud-spoken end-user..All right - what was my emergency again?