A friend of mine gave this to me. I know the "step 2" (bottle on the right) goes into the gas tank. they used this for fuel system cleaning or something. Lmk!
This right here is the bomb. Only I do 1/2 can through the intake, 1/2 can in the gas tank. Haven't ever done any in the oil but it's probably not a bad idea for cars with HLA's.I've had good experience with Seafoam...1/3rd in the oil, 1/3rd in the gas tank, 1/3rd sucked in through a vacuum line. Run it for a few minutes to clean all the crap out, change the oil, and it's done.
Make sure when you suck it in through the vac line you pinch the line off and suck it in SLOWLY - too much at once and you'll hydrolock the engine. If the hose isn't pinched off sufficiently you'll probably stall it (big vacuum leak).hmm.. I'll try the seafoam