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