The burden of proof always lies with the claimant. Not the questioner.
I have access to two or three different dynos and testing facilities, plus friends with OBD scanners, Wideband O2 and other testing equipment.
Send a demo unit and we'll test it opposite a placebo cast/molded in the same shape on a modern car with electronic engine control.
Testing format A-B, A-B, A-B (to normalize for differences between cold and hot running conditions and weather changes during the day), on the dyno, with the engine held via dyno brake at a specific rpm, to test for constant throttle consumption. Blind test versus placebo, semi-randomized by coin flip.
If you really want, we can even do double-blind placebo fuel runs on the highway, same format, A-B, A-B, A-B. Clear highway, cruise control (so no cheating).
But of course, you'll have to pay for the gas.
