回複：回複：回複：回複：機油哪裏去了? “車有三謬，先說其一：合成機油。”

Agree 普通車在常規保養和駕駛情況下不時必須使用合成機油.  But the major reason we need to change oil is because of (per)oxidation/degradation and thus the oil loses it's lubricating property.  Since synthetic resists heat-induced oxidation then why can not we change it less often?  Synthestic one is advertized as lasting longer.  I know regular oil needs to be changed every 3-5 K is an overkill.  Synthetic is uaully changed every 10-15 K.  Since Volvo requires change of regular oil every 10K already, which is probably why they do not recommend a change more than 10K.  I am also surprised that Volvo asks change fo regular oil every 10K but synthetic every 5K (I may understand wrong, you are talking about regular oil every 5K?).  I am not auguing but just want to confirm since the statements are not consistent and do not makes sense to me. 

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• 10K和5K是不同地方的建議。我起初3K換一次，後來5K，現在一年一次 -狼主- ♀ (420 bytes) () 11/15/2010 postreply 15:59:08