Are you suggesting the BG44K for use down the intake like Seafoam, or in the gas tank?
Ingredient wise
BG44K is just a blend of various fractions of mineral spirits and xylenes. Seems they are using less volatile components like Stoddard solvent (and old Exxon name brand of mineral spirits) (less volatile than gasoline) in the formula so that some of it ends up wet in the combustion system in the off cycle(?) long enough to wet the carbon?
http://msdsdigital.com/system/files/208_3.pdf
I know from my chemistry background that high pressure super-heated steam and oxygen can accelerate oxidation of hard to burn stuff like carbon. Google Super critical water and wet air oxidation... Also high pressure super heated water (plus O2) tends to break up into very aggressive OH* free radicals that can eat away at carbon or most anything that can be oxidized. So I suspect people are under estimating the effect of smaller feed rates of water. It also may be safer than the thermal shock, liquid water bouncing around idea?
Just thinking out loud here.
The
B-12 I used is 80% acetone, and 10% of a glycol ether EB (the water soluble solvent used in 409 that works so well...)
https://www.berrymanproducts.com/assets/1AA-CA11-0110C-0113C-0117C-0120C-0152-SDS.pdf
LOL,
Seafoam is about 25% IPA, drug store Isopropyl Alcohol, and the rest listed as a "hydrocarbon blend", trade secret, LOL, in other words Kerosene, mineral spirits, or any one of a dozen other names. I bet diesel fuel would even work.
Chevron Techron is also a range of Mineral spirits, light oil and 1-5 Xylene.
http://www.barbieritrucking.com/uploads/1/4/6/1/14614916/chevron_techron_concentrate_plus.pdf
So they are not the same.
One is high in Acetone, B-12. Two are mostly mineral spirits distillate blends/light oils, Chevron Techron and BG44K, and the Seafoam is up to 25 IPA alcohol and the rest a mineral spirits blend.
I can emulsify some water and mineral spirits and IPA-alcohol/methanol with the Glycol Ether EB solvent one of then is using. And make a use all these ingredients at the same time. Hmm. BTW Glycol Ether EB is great at cleaning carbon from ovens!!!! The key ingredient is Fantastic and 409 household cleaner. The Glycol ether EB is a solvent and emulsifier, both solvent and water soluble, polar and non-polar..... Alcohol is soluble in both also. More so in water, but....
Still looking for others posts on their experiences please!!!!
Having been in the commercial fuel additive business for 10 years, there are differences. We did numerous tests. I even have a camera for looking in the cylinders. This is why I recommend BG44K. The closest to that is Chevron Techron. If you read the fine print on BG44K, they actually license some of Chevron's additives.
Water down the intake is hard on an engine. I have done it dozens of times over the last 50 years. Back when we had leaded gas, buildups were a lot worse, namely on the back of the valves. The trick was to get the motor good and hot. We would take a Coke bottle full of water and pour it down the carb while another person controlled the throttle. The point was to try and keep the rpm's up around 2k or more and not have the engine die, while pouring the water down the intake. The theory is that the thermal shock of the water would cause the carbon to flake off and it would be blown out the tail pipe. I can attest to having seen large chunks of carbon exiting the vehicle. Having said that, I have also seen carbon get wedged between the piston and the cylinder wall, and even a bent valve. It is not without its risks.
Having said all of that, what is your reason for wanting to resort to this? Since no lead fuel, I haven't seen a motor that BG44K wouldn't clean up. I have a fair amount of black buildup on the inside of my intake, but that is due to reversion caused by the overlap in timing between the intake and exhaust on the performance cam I run.