What Does the Engine Oil Model Number Mean?
3 Answers
Engine oil model number represents: Typically indicates viscosity and quality. The viscosity of lubricating oil is often identified using SAE grades. The 'W' stands for Winter, and the smaller the number before it, the better the oil's low-temperature fluidity, indicating a lower environmental temperature it can be used in and better protection for the engine during cold starts. The number after 'W' is an indicator of the oil's high-temperature resistance; the larger the number, the better the oil's protective performance at high temperatures. Automotive engine oil is essentially a lubricant that serves to lubricate and reduce friction in the engine, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption, earning it the nickname 'the blood of the car.'
I've been driving for almost thirty years, and I've always believed that motor oil grades are crucial. Take the common 5W-30, for example—those numbers aren't just random. They tell you how the oil flows during cold starts and hot running conditions. For my oil, the 5W part ensures smooth engine starts in winter without any hiccups, while the 30 part protects the engine from overheating in summer heat. The key is choosing the right oil to match your car's climate and engine needs, preventing excessive wear. Picking the wrong one can lead to oil burning or increased fuel consumption. I once tried using a higher-viscosity oil in northern winters—hard starts and wasted fuel. Now, for every service, I check the manual for recommended grades and adjust with the seasons: 20W for summer, 5W for winter. This balance has kept my car running like new even after 200,000 kilometers.
As a newbie who just got my driver's license, I was initially confused about motor oil grades. Now I understand that markings like 0W-20 indicate oil quality. It shows the oil flows easily at low temperatures for cold starts and thickens slightly at high temperatures to protect the engine. The key is not to choose the wrong 'blood' for your car, otherwise it may damage the engine - a rookie's worst fear. My mechanic told me smaller numbers like 0W mean better fuel efficiency and easier starts in winter, while 20 indicates stronger protection, which suits modern cars. My new car uses this type - it's worry-free and more eco-friendly. Key points include: always follow the manual's recommendation, don't arbitrarily switch oils (different brands have slight performance variations), regular oil condition checks are crucial, and let the repair shop suggest specific grades during maintenance to avoid mistakes.
