寫了這麼多
還以為 JASO 有針對速克達、檔車的"高轉"、"高溫"去做特別實驗和認證
結果又是回到老掉重彈
實際上還是沒有任何定義
文章最後依然落入極壓劑的迷思
同時還在糾結 Energy Conserving, Resource Conserving
看清楚 ASTM D7320 的測試條件是什麼
看完就不用再瞎擔心
API SN PLUS-RC/SN-RC/ILSAC GF-5 - ASTM D7320
引擎工藝差,ZDDP 再高都照樣吃機油
加什麼機油添加劑也不過就是幫引擎裝葉克膜
https://www.astm.org/Standards/D7320.htm
5.1 This test method was developed to evaluate automotive engine oils for protection against oil thickening and engine wear during moderately high-speed, high-temperature service.
5.2 The increase in oil viscosity obtained in this test indicates the tendency of an oil to thicken because of oxidation. In automotive service, such thickening can cause oil pump starvation and resultant catastrophic engine failures.
5.3 The deposit ratings for an oil indicate the tendency for the formation of deposits throughout the engine, including those that can cause sticking of the piston rings in their grooves. This can be involved in the loss of compression pressures in the engine.
5.4 The camshaft and lifter wear values obtained in this test provide a measure of the anti-wear quality of an oil under conditions of high unit pressure mechanical contact.
簡單說 ASTM D7320 是長效測試,測試機油的的壽命的, 請問和保護力有啥關係?
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