I saw in my service manual to use unleaded fuel. Thinking a substitute was necessary & before consulting this forum (slapping forehead REAL hard!!), I puchased a jug of CD2 Super Concentrated Lead Substitute & added some to my tank (I also just noticed this product specifies for off-road use only). So far I've only started the engine out of the water with the muffs on & ran for maybe 5 minutes tops. I have a built in tank & put 10 gallons of lead treated fuel & have a 6 gal. plastic tank with 5 gal's treated fuel. Should I syphon out the fuel & disgard it or will it be OK to just burn it up & not use any more treated fuel?