A couple of guys from work have them on their gas motors and are reporting significant increases in power and mpg. There is a guy on YouTube has one on his 04' Duramax. Look up
HHO Duramax. His video shows mpg in the range of 50 on the highway. Hard to believe, but just the fact it shows that period motivates me to get one installed for myself. This is why I am about a week away from getting mine ready for my Duramax. Got most of the pieces, just need time to get them installed.
