| If an engine lubricating oil's viscosity is given as 20W-50, what does this mean? |
| A) The oil is formulated to meet the low temperature requirements of SAE 20W oil and the 100C (high) temperature requirements of SAE 50 oil and as such is a year-round oil. |
| B) The oil is formulated to meet the 100C (high) temperature requirements of SAE 20W oil and the low temperature requirements of SAE 50 oil and as such is a year-round oil. |
| C) The oil is a mixture of equal amounts of SAE 20W and SAE 50 oil and as such is a year-round oil. |
| D) The oil is a mixture of equal amounts of SAE 20W and SAE 50W oil and as such is a year- round oil. |
