Assertion: motor oil's additive | /r/ObjectUse | used in the making
Facets:
value: from the heavy metal contaminants
type: OTHER
Source sentences:
text: The difference comes down to the amount and quality of the additives used in the making.
text: The hazards associated with used oil result from the various additives used in its manufacture and from the heavy metal contaminants picked up from use in the internal combustion engine.