What is the engine oil capacity of the Buick GL8 in liters?

[Evan]

The engine oil capacity of the Buick GL8 is 4 liters. The functions of engine oil are: 1. As a lubricant, it reduces friction and wear between moving parts; 2. As a coolant, it absorbs heat generated in the engine combustion chamber and piston crown, cooling the engine and protecting against overheating; 3. As a sealant, it fills the gap between piston rings and cylinder liners to prevent combustion pressure leakage. Engine oil quality grades are classified as: SA, SB, SC, SE, SF, SG, SH, SJ, SL, SM, where 'S' represents gasoline engine oil, and the subsequent letters indicate the grade. Diesel engine oil is denoted by 'C', with subsequent letters from A to H also arranged in ascending order of grade.