Water Car Test - HHO Shows Why You Can't Run Cars on Water - Popular Mechanics

Water Car Test - HHO Shows Why You Can't Run Cars on Water - Popular Mechanics: "After batting down the hype over startups and DIYers claiming they could run a car on water, PM's senior automotive editor installs a hand-built HHO kit—only to find he was right the first time. Can bad chemistry keep the myth of the water car alive?"