Ok i have no idea where to put this so i put it here. I see these videos where people say they put seafoam in there brake booster. And all i see is alot of smoke? what the hell does it do? good or bad?

 

It cleans the carbon out of the internals of the engine. The smoke is the carbon being burned out. It is really good for the engine, and ive heard of it helping gas mileage up to 2 or 3 mpg. I think its only for under 100K engines (not positive)

 

There is a DIY on Seafoam on this forum. When I used it, i took the hose out of the fuel pressure regulator and ran the seafoam through the hose. It works great. Read the DIY before you start.

 

https://www.hondacivicforum.com/m_142942/tm.htm