Originally Posted By: lipadj46
Regardless you don't want CS2 in your engine, too volatile and will dissolve gaskets and o-rings.
Correct, limited to products you can safely add to your engine. As I research this I'm realizing that we don't need to dissolve carbon, we just need to dissolve carbon build up which is made up of more than just carbon, as pointed out in this quote from a Seafoam site:
"Carbon is leftover residue resulting from the fuel burning in the engine cylinder. Most of the carbon residue formed by burning fuel in the cylinders is expelled through the exhaust valve and out the exhaust system. However, over time as fuel varnish deposits collect on cylinder walls and on the tops of the pistons, small bits of carbon get imbedded into this varnish. As this process continues, significant carbon deposits can accumulate. Carbon retains heat, and some of these deposits remain so hot that they act like small spark plugs, prematurely igniting the air/fuel mixture that is injected into the cylinder before the piston has reached the correct position – a condition called detonation or pre-ignition. Detonation can cause severe damage to the pistons, valves, sparkplugs and cylinder walls. Sea Foam Motor Treatment dissolves the varnish which is the glue that holds the carbon deposits, and thus allows these deposits to be expelled safely through the exhaust system. "