AG Mechanics CDE Practice Exam 2025 - Free AG Mechanics Practice Questions and Study Guide

Question: 1 / 400

Most small engine manufacturers recommend __________ for temperatures below 40 degrees.

SAE 10W-30

SAE 20W-50

SAE 30

SAE 5W-30

Most small engine manufacturers recommend SAE 5W-30 for temperatures below 40 degrees because it has better cold-start properties compared to the other options. The "W" in the oil grade stands for winter, specifying that the oil is suited for colder temperatures. SAE 5W-30 oil flows more easily at low temperatures, providing better lubrication during startup in cold weather conditions. This ensures the engine parts are adequately lubricated even when the temperature is below 40 degrees Fahrenheit.

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