08LGT80 Posted May 9, 2010 Share Posted May 9, 2010 Anyone use engine additives like duralube, amsoil, lucasoil, zmax, restore, etc., etc. etc? what are ur opinions? which one is best for protection against engine wear? does $30 dollar brands protect better than $6-10 dollars brands? any proven tests on these additives? Link to comment Share on other sites More sharing options...
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