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gfyrasng - I'm not sure if it is this thread or not that I posted basically the same thing as you just did. I'm watching these threads, and so far nobody has been able to post anything regarding improvements in mpg that could be a mathematically distinguishable improvement, beyond just driving in a more efficient manner.
I'm fairly certain that these guys (and I commend them) once they put these systems on their rig are NOT going to drive it like they stole it. So, even if the system has no effect on mpg improvement, I would expect their mpg to go up a little, from their driving consciousness. Kind of like a placebo effect. But I do commend them for their efforts.
Personally, I dislike spending money on fuel. But my opinion is that I am getting a lot more value out of the fuel I'm buying, than I would be getting with these and similar systems.
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