全球：Car Jerks while Accelerate

1) Gas Filter is clogged (this would generally happen more going uphill or when you accelerate)
2) Carb. is going south on you (or jets are clogged on fuel injection systems
3) Fuel Pump is dying or the lines are constricted
4) You have some debris in your gas tank which sort floats arond and cloggs the outlet from time to time
5) Your automatic choke is not functioning properly (the jerking would usually happen when the car is cold or just started running)
6) Timing slips.. or the advance mechanism on the distributor is sticky
7) Spark plug wire(s) are bad and at higher speed arcs out to the engine or ground instead of to the spark plug.
8) mechanical problem (accelerator linkage?)
9) Vacume leak (unlikely but possible)
10) Check your transmission fluid level


http://www.cartechhome.com/2010/07/car-jerks-when-you-accelerate.html
http://answers.yahoo.com/question/index?qid=20080513081723AAbDhoe
http://uk.answers.yahoo.com/question/index?qid=20070326142958AAZ9OSB

全球：引擎油

机油，engine oil 又叫 motor oil。

发动机用的另一种油是机油。5W30、10W30、20W40、20W50等等，标号要优先考虑，牌子倒是不十分重要，反正谁都是王婆卖瓜，自卖自夸的。低标号的机油表示在低温（例如冬天）下也能保持一定的流走性，其粘度较小；高标号的机油则表示在常温和高温下，该种机油的粘度不会太小，以至于要渗进气缸里与燃料油一起烧了。老发动机的气缸壁与活塞之间的缝隙变大了，应选用高标号的机油。无奈加国基本上不卖20W50这类高粘度油，只怕冬天点火困难。其实点火困难一小会儿，路上方便一大阵儿。笔者还是推荐高标号机油。

真正为发动机润滑而设计的机油是人造的，而且是人家老修的军工技术。其设计要点是一旦战争中破坏了油田或炼油厂，机油可通过人造来填补短缺。看官可能没见过阿富汗战争中的苏制坦克，但总会记着在珍宝岛上横行的苏军坦克吧！冰天雪地，照开不误。德国人对此佩服得五体投地。二战期间开赴苏联战场的闪电锐器－德军坦克没什么回的了家的，全冻死在苏联境内了。您猜怎么着？油不行呀！汽车喝什么油，对一场战争的胜负是那么重要，日常生活里也应该是天天讲，月月讲，年年讲的。


http://www.dongfengauto.ca/purchase/buy_in_na.htm