Question 44General Subjects - QMED70% to pass
If an engine lubricating oils viscosity is given as 20W-50, what does this mean?
AI Explanation
The correct answer is A) The oil is formulated to meet the low temperature requirements of SAE 20W oil and the 100oC (high) temperature requirements of SAE 50 oil and as such is a year-round oil.
This is correct because the 20W-50 designation indicates that the oil meets the low temperature viscosity requirements of an SAE 20W oil (for cold weather) and the high temperature viscosity requirements of an SAE 50 oil (for hot weather), making it suitable for use year-round.
The other options are incorrect because B) is the reverse of the actual meaning, C) indicates a simple blend of two different oils, and D) refers to a different oil viscosity designation (20W-50W).
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