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The engine is quieter now than when it was new.

I am not easily impressed but your fuel additive cured a noise in the fuel pump of my 25hp 4 stroke merc, it would stick and not pump, now it works great. I used your HD oil additive in my 2000 chevy tahoe that has had a piston slap when started cold (they all did) since I owend it,,after I used the HD additive --at 164000 miles no noise :) the tahoe has 165000 miles on it now and the engine is quieter now than when it was new ??? GREAT product !!!! -Robert Lane

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