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01. What are Lubricants? |
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02. What is mineral oil? |
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03. What is synthetic oil? |
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04. What do lubricants do? |
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05. What is viscosity? |
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06. Why do various levels of viscosity exist? |
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07. What is multi-grade oil? |
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08. Is it better to use SAE 15W-40 or SAE 40 oil? |
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09. Why do we need to change the engine's oil? |
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10. When do I have to change the oil? |
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11. What can happen to the engine if you don't change your oil at the recommended change period? |
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12. Which problems can too much or too little oil cause on the engine? |
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13. What is the correct way to check the oil level? |
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14. When should I add oil to the engine? |
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15. If I just add oil and never change it, will it cause damage to the engine? |
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16. Can you mix different brands or types of oil? |
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17. Can I add additives to the oil? |
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18. Why does the engine oil become dark after using it for some time? |
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19. Can I know if the oil is in good usable condition or not by just touching it? |
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20. What is the SAE classification? |
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21. What is the API classification? |
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22. What is the ACEA classification? |
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23. How do I know the oil's classification? |
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24. Can I use API CI-4 oil for more time than the API CH-4 oil? |
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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? |
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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? |
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27. What do the numbers (20W40, 50, etc.) that show on the oil packages mean? |