01. What are Lubricants?

02. What is mineral oil?

03. What is synthetic oil?

04. What do lubricants do?

05. What is viscosity?

06. Why do various levels of viscosity exist?

07. What is multi-grade oil?

08. Is it better to use SAE 15W-40 or SAE 40 oil?

09. Why do we need to change the engine's oil?

10. When do I have to change the oil?

11. What can happen to the engine if you don't change your oil at the recommended change period?

12. Which problems can too much or too little oil cause on the engine?

13. What is the correct way to check the oil level?

14. When should I add oil to the engine?

15. If I just add oil and never change it, will it cause damage to the engine?

16. Can you mix different brands or types of oil?

17. Can I add additives to the oil?

18. Why does the engine oil become dark after using it for some time?

19. Can I know if the oil is in good usable condition or not by just touching it?

20. What is the SAE classification?

21. What is the API classification?

22. What is the ACEA classification?

23. How do I know the oil's classification?

24. Can I use API CI-4 oil for more time than the API CH-4 oil?

25. What do the acronyms (API, ACEA, JASO, and NMMA) that come on the oil package mean? What do they mean in relation to the product's performance?

26. In relation to automotive gearbox oil, what is the difference of specifications between API GL-4 and GL-5? Is there any problem to use GL-5 instead of GL-4?

27. What do the numbers (20W40, 50, etc.) that show on the oil packages mean?

 

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