Is it mandatory to use 0w20 engine oil for the Malibu XL?
2 Answers
The Malibu XL does not necessarily require 0w20 engine oil; 5w30 engine oil can also be used. The primary functions of engine oil are to reduce friction and wear on moving parts, clean sludge (one of the functions of dispersants) and varnish (detergents) from the engine. It also neutralizes acids produced from fuel and lubricant oxidation (detergents), improves the sealing of piston rings, and cools the engine by carrying away heat from moving parts. Taking the Malibu XL 2021 535T Automatic Sharp Edition as an example: the manufacturer of this car is SAIC-GM Chevrolet, classified as a mid-size car, with a gasoline energy type.
I've driven a Malibu XL for three years. According to the manual, the manufacturer recommends using 0W-20 oil to improve cold-start efficiency and fuel economy, but it doesn't mean it's the only option. I've personally tried 5W-30 in different seasons, and it felt smoother during long summer drives without any issues. The key is to ensure the oil meets the API certification level, with SP grade being a good choice. Engine design focuses on lubrication and heat dissipation, and using the wrong oil may increase wear or shorten lifespan. If you're in a cold region, 0W-20 indeed has significant advantages for quicker starts. In warmer environments, occasionally using compatible 5W-20 or 10W-30 is reasonable, but it's best to check the manual or consult a mechanic first to avoid affecting the warranty. My personal experience is that regular inspection and oil changes are more important than obsessing over a single viscosity grade.
