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All of those additives are just voodoo crap. I agree, just use a good quality oil and forget those things. Now, adding a little cleaner in the gas, like maybe SeaFoam, I agree with.
BS marketing just like the Teflon additives of 20 yrs ago which dropped out and solidified in the bottom of the oil bag .
This kind of crap is targeted at solid bearing engines in auto's & bigger applications , Harley engines are almost all roller & ball bearing two completely different animals here .
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