Oil Viscosidade Grades
Understanding SAE Ratings
Learn Oil GradesMotor oil viscosity grades like 5W-30 tell you como o oil flows at diferente temperatures. Understanding estes ratings helps you choose o right oil for your engine e climate conditions.
Comuns Oil Grades
| Grade | Cold Start | Melhor For |
|---|---|---|
| 0W-20 | Excellent | Modern fuel-efficient engines |
| 5W-30 | Muito bom | A maioria passenger vehicles |
| 10W-40 | Bom | Moderate climates, older engines |
| 15W-40 | Fair | Diesel engines, hot climates |
| 20W-50 | Poor | High-performance, racing |
Lower W numbers flow better in cold; higher segundo numbers maintain protection quando hot.
Conclusão
Always use o viscosity grade recommended in your owner's manual. Modern engines often require thinner oils (0W-20, 5W-30) for fuel efficiency e tight tolerances. Thicker isn't always better—o wrong viscosity can reduce fuel economy e cause wear.