Who determines the recommended SAE grade for engine oil according to the maintenance guidance?

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Multiple Choice

Who determines the recommended SAE grade for engine oil according to the maintenance guidance?

Explanation:
The recommended SAE grade for engine oil is determined by the engine manufacturer. The grade is chosen based on the engine’s design, clearances, bearing tolerances, and the typical operating temperature range, ensuring reliable lubrication during cold starts and under all operating conditions. The maintenance guidance published by the manufacturer specifies this exact viscosity need, so technicians follow that official recommendation when servicing engines. While regulatory bodies set general oil performance standards and the technician applies the guidance, they do not decide the specific grade for a particular engine.

The recommended SAE grade for engine oil is determined by the engine manufacturer. The grade is chosen based on the engine’s design, clearances, bearing tolerances, and the typical operating temperature range, ensuring reliable lubrication during cold starts and under all operating conditions. The maintenance guidance published by the manufacturer specifies this exact viscosity need, so technicians follow that official recommendation when servicing engines. While regulatory bodies set general oil performance standards and the technician applies the guidance, they do not decide the specific grade for a particular engine.

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