Such competition, of course, inspires questions of whether O'Reilly's in-house motor oil is any good ... as well as SAE ...

It is a primary component of how SAE oil grades are defined (15W-40, 10W-30, 5W-40, 5W-30, etc.). Absolute viscosity is expressed as centipoise (cP). It is a measure of frictional drag within the ...

Each engine requires a specific type of motor oil. Popular types of motor oil include 5W-30, 10W-30, and 0W-20. Those numbers and letters refer to the oil's viscosity or thickness. As long as you ...

Any higher/ thicker grade(10w-30), might have constraints in the oil flow through the tighter tolerances maintained in the construction of these modern machines.

Lubrication Engineers (LE), a leader in high-performance lubricants, announces its comprehensive line of engine oils designed to provide exceptional protection and performance across a wide range of ...