SA and SB graded oils are good only for very light-duty applications and are obsolete for automotive engines, although they are sometimes found on market shelves.

Question

Quizplus · Accepted Answer

SA and SB graded oils were introduced in the 1930s and 1940s but are now considered obsolete for use in modern automotive engines. They are only suitable for very light-duty applications and are not recommended for use in cars or trucks. Despite this, they may still be found on market shelves.

SA and SB Graded Oils Are Good Only for Very