[P-hack]

I think what is bugging me most dbrcc isn't my ego, but your presumption and the expectations you put on others. Combined with the general lack of understanding that the results vary greatly by car and even with a build log you may need to be able to make many other modifications that are specific to your vehicle, and might not have the stuff to tune it or validate the results. It may still be beyond the reach of many DIYers, which are some of the same reasons that make it hard to market accurately.

There are a lot of HHO sellers competing with each other and making lots of unfounded claims as a result, and I understand the appeal of using plain old water and baking soda to boost your mileage, but there are many practicalities to consider.