What Type of Engine Oil is Suitable for Jetta Cars?
2 Answers
According to the manufacturer's recommendation, the suitable engine oil for Jetta cars is the original specification oil SG-5W-40. The functions of engine oil are as follows: Lubrication and Friction Reduction: Forms an oil film on the surfaces of two sliding components to prevent friction during operation, ensuring smooth movement of the components. Cleaning and Dispersion: High-quality engine oil can flush away dirt on the surfaces of parts through oil flow, adsorb tiny metal fragments in the engine, and then scrape them into the oil pan via the piston oil ring. Cooling and Temperature Reduction: When the engine operates, it generates high temperatures. When the oil reaches the operating parts, it absorbs heat and carries it away, assisting in the heat dissipation of the components. Sealing and Leak Prevention: Forms a sealing ring between the piston ring and piston through an oil film, preventing combustion exhaust gases from entering the crankcase.
I've been driving for almost 10 years. The suitable engine oil for Jetta mainly depends on the engine model and manual recommendations. Most Jetta models can use SAE 5W-30 or 5W-40 viscosity grade oil. The 5W indicates good low-temperature fluidity for quick winter starts, while numbers like 30 or 40 refer to high-temperature protection, preventing issues during summer highway driving. For my daily city commuting, I choose semi-synthetic or mineral oil with API SN standard, which offers good cost performance and requires oil changes every 5,000 to 7,000 kilometers. When adding oil, always check that the oil level is in the middle of the dipstick—don't overfill to waste oil or underfill to risk engine damage. In extremely cold regions, switching to 0W-30 ensures easier starts, saving money while protecting the car. Remember to regularly check the oil color and change it early if it turns black.
