Engine oil with the assigned “S” designate tells us it is ____________.

• slippery

• used in spark-ignited engines

• used in single-cylinder engines

• used in sequential-fired engines

The API symbol is in the shape of a ____________.

• donut

• star

• square

• cylinder

A major disadvantage of synthetic oils is they ____________.

• have poor cleaning capabilities

• are costly to produce

• are poor at soot loading

• have poor temperature-related flow

A defective engine oil cooler may cause ____________.

• coolant to enter the engine oil

• engine oil to enter the engine coolant

• leaks oil to the environment

• leaks coolant to the environment

A piston cooling nozzle is aimed at the ____________.

• top of the piston crown

• cylinder wall

• bottom of the piston crown

• connecting rod

The EPA recommends oil filters be hot-drained for ________ hours before disposal.

• 24

• 18

• 12

• 8

Natural gas engines use the same engine oil as diesel engines.

• True

• False

Oil viscosity is a measure of how well oil flows at a specific temperature.

• True

• False

Oil performs the following functions: Select all that apply.

• Reduce wear on moving parts

• Inhibit corrosion

• Improve fuel economy

• Clean engine components

What keeps soot in suspension to prevent it from accumulating into sludge in the crankcase or elsewhere.

• Zinc

• Detergents

• Viscosity

• ZDPPP