teabox wrote:
很多的比例是多少? ...(恕刪)
很多的比例就是你隨便google都找的到
專業論壇也有討論
也有測試的模式跟公式解
你如果覺得自己的親朋好友說的就是正確的，或代表歐美世界所有專業技師的看法
那你跟你不認同的那些「一知半解台灣鄉民」並沒有兩樣
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純粹討論
icta wrote:
短程行駛怎麼定義呢？
一般來說單程10 miles或16km以內的都可以稱為短程行駛
若非走走停停，這樣的距離大約二十分鐘內可以到達，引擎溫度則不容易達到良好的水準...(恕刪)
在台北16KM可以在20分鐘到達，這樣平均時速48km/hr(要包括停紅綠燈，和轉彎等車..)我想要半夜才有可能吧。
引擎溫度則不容易達到良好的水準？車子開個5分鐘水溫即到達標準溫度，我不懂引擎要熱多久才會到達良好的水準？
剛才找了GOOGLE一下，是有人建議每3000mile換機油，他所持的理由是美國人一年駕駛12000mile，3000mile等於一年四次，每次USD25(這麼便宜，可能是礦物油吧)，一年才USD100-，常換沒有百害。
My point is: The average American driver drives 12,000 miles a year, so that is four oil changes a year. At $25 an oil change, that's about $100 a year to have your cars looked over and make sure things are A-OK.
但是也有人說Car and Driver測試過紐約的計程車每6000mile換機油，及果發現換下來的機油還很好。
Car and Driver tested New York taxi cabs under a test that changed oil at 6,000 mile intervals and found the oil to be near perfect after 6,000 miles of taxi service.
http://www.trustmymechanic.com/change_oil.html
當然大部分的意見是請你看車主手冊的建議，但還是隱含的說不需要每3000mile換機油
Here’s what to do: Check your owner’s manual and follow the manufacturer’s recommendation. If it says change the oil every three months or 3,000 miles and you haven’t traveled 3,000 miles in that time, change it anyway. But, I think you’ll find that the recommendations are much longer than that. For instance, Acura suggests that I change the oil in my car every 7,500 miles or one year. (Acura甚至建議每7500mile或一年更換機油)
http://www.msnbc.msn.com/id/12359794/ns/business-consumer_news/
至於油泥(sludge)有人是這樣說的:
根據2005年消費者報導某些品牌的車子引擎容易產生油泥，不管是是否經常更換機油。
The most common factor in sludge buildup is mineral oils combined with a lack of maintenance by the car owner combined with harsh driving conditions. But this isn't true in all cases. For some reason, a 2005 Consumer Reports article discovered that some engines from AuXX, ChXX, SaXX, ToXX, and VolkXX appear prone to sludge almost no matter how often the oil is changed.
當然在嚴苛的駕駛條件下，如果20000mile或是12個月換機油，不是以上廠牌的引擎還是會有油泥的。(點進連結有一個例子)
In this example, the consensus was that the sludge buildup was caused by an overheating engine, oil that hadn't been changed for 20,000 miles of stop-go city driving, a lot of cold starts and a period of about 12 months in storage without an oil change.
http://www.carbibles.com/engineoil_bible.html#blackdeath
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