BENCHProject Farm index

Fuel & Fuel Economy

AMAZING 35% More MPG with HHO? Let’s find out! Help with high gas prices?

May 2021/12 min/2 products tested

Watch the test ↗

The verdict

He didn't give an outright ranking in this one — the full tested list is below.

Other picks

  • Avoid

    HHO Generator Kit

    “I was really hoping to see the oxygen hydrogen generator kit deliver great results, but unfortunately, it just didn't work out.”
    Buy ↗

Everything tested 2

Links go to Todd's own Amazon listings with his affiliate tag intact — this site adds nothing and takes nothing.