NO my friend... the weather is not the culprit. at about 1800 kms the oil is at the end of its life. As mineral 20W40 oils will last for around 2K kms. A 10W40 semisynthetic AX7 contains only 15% synthetic content. rest is mineral oil.
Try motul 30004T 20W40. Its a JASO certified oil. It will last for 500 kms more than shell AX5 20W40. This is my personal experience.
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I have never heard of harley davidson manufacturing motorcycles in the 110,125 and 150cc categories. People on this forum are using HDEOs in bikes within this category. So I would like to know the whole and absolute truth about using HDEOs in this cc category.
OK. now that no users having first hand experience in using HDEOs want to come out with the "doodh ka doodh, pani ka pani"about the HDEOs.
I have some points to ponder about that are intriguing me for long about the HDEOs.
1) What makes the HDEOs inherently more beneficial in terms of protection?
2) IT is a world established fact that a thicker oil provides better protection at high temperatures. IS HDEO thicker than motorcycle oil? Hence better protection??
If yes, then does it provide better protection in cold starts? logically it cannot as thicker oil takes time to flow in the nooks and crannies of the engine and till then the damage is done.
3) Does a HDEO has a better additive package? I know it has a better detergent package. but detergents do not better lubrication at high temperatures. They just keep the engine clean. On second thoughts if the motorcycle engines are not equipped to handle high detergent concentrations then it can cause foaming which is harmful in the long run.
4) Are HDEOs made of ester base stock? The 300V range of Motul oils are made of ester base stocks. Ols made of Ester base stocks are inherently equipped to provide better protection at high temperatures by virtue of the Esters chemical properties. I can elaborate more on this subject. But thats a separate discussion/







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