AG Mechanics CDE Practice Exam

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Prepare for the AG Mechanics CDE Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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

  1. SAE 10W-30

  2. SAE 20W-50

  3. SAE 30

  4. SAE 5W-30

The correct answer is: 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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