A 2011 Subaru Forester’s
oil type is 5W-30 motor oil. It requires 5 quarts. Subaru recommends Mobil 1 High Mileage Synthetic Motor Oil 5W-30 in order to keep the engine running smoothly. Here are some things to know about 5W-30 synthetic motor oil.
This kind of oil works well in both high and low temperatures. Both numbers—the 5 and the 30—refer to the oil’s thickness, or viscosity.
The 5 indicates the oil’s viscosity remains thin at very low temperatures. Related to this point, the W stands for winter. The 30 indicates this oil stays thin and keeps flowing at very hot temperatures, as well.
With synthetic motor oil, you’ll need to change your oil less often—about every 7,500 to 10,000 miles. Synthetic motor oil has also proven to be less damaging to your engine.
Your father-in-law should check his oil often—or wait, maybe you should check his oil often? The oil should be light brown or amber, and it should have a smooth consistency. If the car’s oil is dark brown or black or if the driver smells burning oil or sees smoke coming out of the engine, change the oil!
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