Engine oil types

Knowing what motor oil to use matters. Semi synthetic engine oils provide a balance between the economy of conventional oil and the strength of full synthetic oil. Leading part synthetic oils include Castrol® GTX® Ultraclean and Castrol® GTX® High Mileage, engineered for cars with over 75,000 miles on the odometer.

FAQ engine oil types

How many types of engine oil are there?

In general, there are three types of engine oil: Mineral, Semi-Synthetic and Synthetic Engine Oils.

What type of oil is motor oil?

Motor oil sample. Motor oil, engine oil, or engine lubricant is any of various substances comprising base oils enhanced with additives, particularly antiwear additive plus detergents, dispersants and, for multi-grade oils viscosity index improvers. Motor oil is used for lubrication of internal combustion engines.

What are the different types of engine oil grades?

Based on the coldest temperature the oil passes at, that oil is graded as SAE viscosity grade 0W, 5W, 10W, 15W, 20W, or 25W. The lower the viscosity grade, the lower the temperature the oil can pass. For example, if an oil passes at the specifications for 10W and 5W, but fails for 0W, then that oil must be labeled as an SAE 5W.

What type of oil do you put in a car engine?

Car manufacturers usually specify 5W-20 or 5W-30 oil, though some require 10W-30. These three ratings cover just about every light-duty vehicle on the road, though this is changing as engines become more precise and fussy about specific types oil.

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