Is 0W40 Engine Oil Suitable for All Seasons?

2 Answers
PaisleyFitz
09/01/25 5:44am
0W40 engine oil is suitable for all seasons, but the selection should be based on the temperature of the region where the vehicle is located. When choosing engine oil, car owners can consider the local temperature, vehicle characteristics, and condition. Using oil with excessive viscosity can increase movement resistance and affect engine power. Engine oil, also known as motor lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. Engine oil consists of base oil and additives. The base oil is the main component of the lubricant, determining its basic properties, while additives compensate for and improve the shortcomings of the base oil, providing certain new characteristics, making them an essential part of the lubricant.
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McWyatt
09/13/25 8:24am
I've been using 0W40 oil for three years, and it starts right up even at -30°C in Northeast China. During summer highway drives, I've gone eight hours straight without any oil temperature warnings. However, I must remind you that oil viscosity grades aren't everything. Take my buddy's old German turbocharged car for example - the manual clearly requires 0W40 with A3/B4 certification. He cheaped out and used a no-name brand, and sludge formed after just one winter. When choosing oil, don't just look at the viscosity grade; consider OEM certifications and base oil quality too.
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