obsolete S-adenosylmethionine:2-demethylquinol-8 methyltransferase activity (obsolete GO:0102027)
OBSOLETE. Catalysis of the reaction: 2-demethylmenaquinol-8 + S-adenosyl-L-methionine = menaquinol-8 + H+ + S-adenosyl-L-homocysteine.