Correct answer
SAE 20W-40.
SAE 20W-40 is multigrade: 20W identifies its low-temperature viscosity performance and 40 its high-temperature grade. W means winter. The numbers are classification grades, not temperatures or a single viscosity for each season. Oil normally becomes less viscous as it heats up; a multigrade meets the required performance in both ranges rather than thickening when summer arrives. Use the grade and approvals specified by the manufacturer.
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SAE 20W-40.
SAE 20.
SAE 60.
The real exam in English is a translation of the Spanish original; compare both here.
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¿Cuál de las siguientes especificaciones corresponde a un aceite multigrado?
- SAE 60.
- SAE 20W-40.(Correct answer)
- SAE 20.
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