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The 2015 GMC Terrain featured a standard 2.4L 4-cylinder engine, with the option to upgrade to a more powerful 3.6L V6 engine. The 2.4L engine requires 5 US quarts of 5W-30 synthetic motor oil, while the 3.6L engine needs 6 US quarts of the same oil. The oil drain plug on this vehicle has a 15mm head size and should be torqued to 20 ft/lbs for removal. Oil changes for this model should be done approximately every 10,000 miles.
The oil recommended for the 2015 GMC Terrain is a full synthetic SAE 5W-30. In very cold temperatures of -20F or lower, it is advised to use SAE 0W-30 oil. The oil capacity for the 2.4L 4-cylinder engine is 5 quarts, while for the 3.6L V6 engine, it is 6 quarts.
Thicker oil