What Grade of Engine Oil Should Be Used in Winter?
3 Answers
In winter, W-grade engine oil should be used for the following reasons: the temperature is relatively low in winter, and the fluidity of engine oil in cold conditions is poor. Choosing engine oil with low viscosity, low pour point, and anti-wear properties can provide protection for the engine and help extend its service life. The functions of engine oil are: 1. Reducing friction and high temperatures; 2. Cooling and temperature reduction; 3. Cleaning and purifying; 4. Shock absorption and buffering; 5. Rust and corrosion prevention. Engine oil, also known as engine lubricant, is composed of base oil and additives. The base oil is the main component of the lubricant, determining its basic properties, while additives can compensate for and improve any shortcomings in the base oil's performance.
In winter, I've been driving for over a decade and lived in the northern regions, always opting for low-viscosity grades like 5W-30 because of its excellent low-temperature fluidity. It ensures smoother engine lubrication during cold starts, preventing wear and tear. When temperatures drop in winter, if the oil is too thick, starting the engine feels sluggish, and the engine is more prone to damage. I make it a habit to change the oil every six months, checking the manufacturer's recommended grade before the season changes, as different car models may have varying requirements—5W-30 isn't universally suitable. Once, I neglected a timely oil change, leading to difficult morning starts and unnecessary repair costs. Now, I stick to regular maintenance, preparing when temperatures drop below freezing to keep the engine healthy and safe.
I enjoy researching cars in my spare time, and choosing the right engine oil for winter is crucial. The 'W' stands for winter suitability, and 5W-30 is a common choice—it maintains flow at low temperatures, preventing damage from hard engine starts. If you're in a colder region, you can even opt for a thinner grade like 0W-20 to improve fuel efficiency and reduce emissions. Personally, I recommend sticking with reputable oil brands and paying attention to oil quality and change intervals. Don’t forget to change the oil before winter to ensure no old oil residue remains in the engine, as this helps protect and extend its lifespan.
