Normally with one RunAutoWithWater system, it is enough for up to a 8
cylinder engine and members get a very good increase in fuel efficiency
and gas savings.
We also give you some design modifications to produce a 2, 4, 6 cell
system to produce more oxygen and hydrogen (HHO, oxyhydrogen or Brown's
gas) that can help increase your fuel economy even more. So, the
answer is that the basic system works great, but if you vehicle has
additional space in the engine compartment you can include additional
ones.
Ryan
Run Auto With Water Mechanical Support
http://www.runautowithwater.com