低調的小孩~ wrote:
小弟又換機油了，這次改成Amsoil AZO 0w30 有看了一下資料，這款長效油，TBN高達12.6！
有其他油比他高嗎@@
既然有人提到TBN，那我就再把之前提出來，可是沒人要回答的問題再提一次，希望這次有那位高手能幫我解惑。
Mobil 1 ESP 5W30的TBN才5.1，TBN這麼低，用起來會不會很"短效"？
toyulong wrote:低調的小孩又換機油了...以後叫他有錢的小孩好了...
TBN的使用極限數值...(恕刪)
我也覺得他一點都不低調, 不過蠻喜歡他的發言, 因為他都有準備資料,
而且是實驗加理論的,
不像某些人只會爬文,打高空,
實際上好像不是那回事,
我沒有說誰,
不要對號入座,
阿嘉5011 wrote:
低調的小孩又換機油了...(恕刪)
果然要這樣大家才會來討論~~呵呵
低調在低調!!!純粹自己想測試@@~~~要自己試才是王道
為了要實驗機油已經花費很多小朋友了= =!!!心在滴血
因為我幾乎把mobil都用過了~以我的能力買得到的番數都給他測試了一番時間@@
所以測試下一種牌子~雖然Amsoil不是大廠但是老牌子@@
主打100%PAO 應該是不會虎爛人啦@@被騙也沒辦法@@哈哈
目前使用的是AZO 0w30 Amsoil 最頂級機油~我問總代理他是說大量的PAO+一些G5這樣@@
這支機油放在公司忘記拍照@@~明天上班在PO上@@
如果有大大推薦哪的好~~小弟可以花一點小錢可以試試@@一公升超過400就免剌~還是要生活得@@哈哈
剛找了一下，已經同步更新在第一頁，內容寫得很清楚。
補充:
先簡單回答前面網友的問題，也就是油的長效與否或是否需要更換，不是只單看TAN的增加或TBN的減少數值或原始TAN or TBN值。但當TAN值開始大於TBN值時，會有較高的可能性加速引擎的磨耗，也為是否替換機油的時機提供參考。
Total Base Number (TBN)
TBN is a property usually associated with engine oils. It is defined as the oils' ability to neutralize acid. The higher the TBN, the more acid it is able to neutralize. This quality is also referred to as alkaline reserve and is directly proportional to the amount of active detergent contained in the oil. New engine oils typically possess TBN's from 5.0 to 15.0, depending on manufacturer and intended service. As the oil is used, it becomes contaminated with acids and the TBN drops. Generally, TBN levels below 3.0 are considered too low and indicate that the oil should be changed. One cause of TBN depletion relates to the use of low quality, high Sulfur fuel. During the combustion process, this Sulfur turns to Sulfuric acid and in turn, accelerates TBN depletion. As discussed previously, overheating and over-extended drain intervals can cause oil oxidation. The products of oxidation are acidic and will cause the TBN to drop.
Total Acid Number (TAN)
TAN is a property typically associated with industrial oils. It is defined as the amount of acid and acid-like material in the oil. Oxidation and nitration resins make up the majority of this material. As the oil is used, acidic components build up in the lubricant causing the TAN number to increase. A high TAN number represents the potential for accelerated rust, corrosion and oxidation and is a signal that the oil should be replaced. Critical TAN numbers are dependant on oil type. Typically R&O and light duty oils have a maximum TAN of 2 while anti-wear and EP oils may have maximum levels of 3 to 4.
TAN - TBN Ratios in Engine Oils
TAN by itself is of limited value in determining oil condition of an engine oil due to the fact that it represents a combination of different chemical characteristics. The acid-like nature of anti-wear additives found in most modern engine oils cause a high initial TAN. Greatest benefit is derived from the TAN by comparing it to the TBN. TAN increases in service as TBN decreases. The point at which these two numbers meet has been indicated as the maximum useful oil change interval for that type of engine in that type of service. Studies have shown that when TAN exceeds TBN, engine wear accelerates at abnormally high rates.
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