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Marvel Mystery Lubricating Oil is safe for catalytic converters and oxygen sensors. Added to gas it cleans and lubricates fuel injectors and

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Marvel Mystery Oil MM13R-6PK - 32 oz. (Pack of 6)

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Marvel Mystery Oil lubricates the entire fuel system - fuel pumps fuel injectors or carburetors and the top portion of the cylinders. These are areas

Marvel MM13R-6PK Mystery Oil - 32 oz., (Pack of 6)

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Kit Includes (2) 16oz. Bottles of Marvel Mystery Oil additive Cleans and lubricates fuel injectors and carburetors Reduces and prevents varnish and

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