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International Automotive Technicians Network
Re: Marvel Mystery Oil
Posted to Technical Discussion Forum on 10/25/2010

MMO composition is/was

74 percent mineral oil 25 percent stoddard solvent 1% dichlorobenzene

A chemist I know broke it down and reports:

69% baseoil 30% varsol 1% dichlorobenzene

Wintergreen fragrance

From the MSDS:

SPECIFIC GRAVITY: 0.876 @ 60 ... Login to read more.