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I remember seeing either Mythbusters or TopGear episode where they tested this.
by jyriand 5y ago
I remember seeing either Mythbusters or TopGear episode where they tested this.
- TheSocialAndrew 5y agoIt was a Mythbusters episode, and they concluded that you needed to be following the truck extremely closely (I believe within a couple of feet) to see a gain in fuel efficiency. The driver was unable to keep that small distance consistent for a continuous period of time causing more speed variations, resulting in a loss of fuel efficiency.