Liqui moly 5160 speed diesel additive 1l liqui moly 5160 p this speed diesel additive 1l from liqui moly has been developed to form a mixture of agents with cleaning dispersing and material protection properties ideal for today s engines fuels and running conditions p p added to diesel fuel for all diesel engines in passenger and heavy goods vehicles tractors construction machinery and stationary engines preserving engines when decommissioned for long periods under extreme conditi