Some hypermiling techniques do add considerable time to your commute (like cruising speed reduction), and some don't (like timing lights and DWB). The best technique is to live closer to work. You'll use less gas AND spend less time driving.
I avoid some hypermiling techniques because the amount of fuel they save doesn't justify the amount of time they take. I rely on my car, not just driving technique, to get the fuel economy that I do.
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