Should I use 40 or 50 diesel engine oil in winter?
1 Answers
Diesel engine oil should use 40 in winter. Engine oil grades: Semi-synthetic oil and fully synthetic oil have their own grades. Many car owners will notice when changing oil, such as 5w-30 or 5w-40. These grades represent different antifreeze and high-temperature viscosity properties of engine oil. Engine oil quality grades: Engine oil beginning with S indicates it is for gasoline engines; engine oil beginning with C indicates it is for diesel engines. API is the abbreviation for the American Petroleum Institute. The API grade represents the quality grade of engine oil, used to indicate the working capability of engine oil.