That's too bad about the filter, Shane. Mine cost about $80 CDN with tax, so I'm the biggest loser! (I love winning things.)
Even though it showed no FE gains at constant speeds, I left it in the car since there is the theoretical possibility that it helps under higher load driving (e.g. accelerating). But that's just me grasping at straws, trying to justify having spent the money.
Your post reminded me I should put it up for sale and maybe get some of the $ back.
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