(3). Because some synthetics are more fluid and may shrink gaskets and seals, some engines may leak oil when switching to synthetic oil from mineral oil. ----------------------------------- 曾有過一次經驗,festive新車牽來本來都是原廠免費贈送的礦物油,一直都沒事,後來二萬公里後,自備中油的sj9000,結果到了下次保養,就發現搖臂蓋墊片開始滲漏了,雖然或許是巧合,但也很可能是應驗了上述合成油的缺點。
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