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The Chevy Equinox requires synthetic blend oil with a viscosity rating of 5w-30. If you're curious about what those numbers and letters mean, the Society of Automotive Engineers (SAE) created standards that show how thick or thin the oil is at different temperatures. For instance, with a 10-30W oil, the "10W" indicates the oil's thickness when the engine is cold, while the "30" shows how thick the oil is during normal engine operation when hot. Some motor oils are designed to be thinner when cold and thicker when hot, depending on the weather and season. Therefore, you might need to switch to a different oil based on the temperature and environment you're driving in.
The chevy equinox should use 5w-30 synthetic blend oil as the preferred engine oil choice.