CLGS Fundamentals of Lubrication – Lesson 5 Quiz

The ______ base oils are the least refined of all of the groups. They are usually a mix of different hydrocarbon chains with little or no uniformity. Due to their instability and poor overall properties, most of today’s engine oils use very little, if any, Group I base oils. They are generally used in less demanding applications.

The ______________ base oils undergo severe hydroprocessing and catalytic dewaxing and are subjected to the highest refining levels and while they originate from crude oil. They are chemically rearranged to offer molecular uniformity and stability for very good performance in a wide range of lubricating properties. They are commonly marketed as synthetic or mixed with lower group base oils and marketed as semi-synthetic products.

Polyalphaolefins (PAOs) are chemically engineered ___________. When combined with additives, they offer excellent performance over a wide range of lubricating properties. They have very stable chemical compositions and highly uniform molecular chains.

Naphthenic mineral based oils are considered to be __________.

Synthetic base oils offer _______________ compared to mineral oils.

In your current role, determine how base oil selection will influence your responsibilities: