Hoh/HHO has been well DEBUNKED. Makes sense they’d use one of the most popular P&D lines to keep dilution flowing!!!
See these? 'HHO/HOH engine' DD: EPA, DATELINE NBC, POPULAR MECHANICS-SAY-SCAM, links below.
Why have reports been done by major media? To warn the nation about the scam brother! A LONG time ago!
DD originating from people trying to peddle HHO is not DD IMO, the UNITED STATES ENVIRONMENTAL PROTECTION AGENCY ran many scrutinized tests that showed NO IMPROVEMENT and a lot of shady talk:
Dateline NBC/US Environmental Protection Agency expose link (3 parts):