Yea, Advance has it. Seems to be genuine snake-oil for engines, be they gasoline or diesel :

"Sea Foam� Motor Treatment for Gas and Diesel Engines is a 100% pure petroleum product that works instantly to clean deposits from internal engine parts and remove moisture from oil crankcases and fuel tanks. As a fuel system additive, Sea Foam� will clean carburetors, fuel injectors, clean carbon, gum and varnish deposits, add lubricity to fuel, stabilize fuel and control moisture. As an oil system additive, Sea Foam� controls moisture, gum, varnish and residue deposits"

and all for only $6.99 !!!!

( I like the 'lubricity' part, rekon if my gas is lubricated, should flow better )