【大纪元2018年04月14日讯】读者Henry问：李先生您好！我的车是2010年Toyota Venza V6。只开了大约5万英里。车速达到70英里或以上时方向盘会抖。当车速45英里以上时踩刹车也会抖。还有个毛病，在颠簸路面时，方向盘柱里面发出“格格”声。有人说是有个螺丝松了。要拧紧它就必须换安全气袋。
换了新轮胎，做了两次平衡还是没用。应该不是轮胎的毛病。我猜方向盘柱的噪音和抖动可能是同一个病因？
恳请李先生解惑，不胜感激！颂安！
李进答：Henry您好，
1) 车速达到70英里以上方向盘抖动表示前轮平衡Balance不对，如果平衡已经做过，则需要检查轮毂是否有所被马路边撞过有点变形。再就是前轮悬挂系统的是否有所松脱？需要检查一下，并做一下前轮定位Alignment。
2) 踩刹车抖动表示前轮刹车盘有所变形，需要打磨或更换。
3) 方向盘的噪音需要检查方向盘柱Steering Column和前轮悬挂系统的连杆松动有关。请检查。
读者Dave Liu 问：Dear technician Mr. Lee, I recently bought a 2004 Honda Civic at 16,730 Kilometers, and I found out that the engine oil from the car is very dark black in coloration. My technician has informed me that the oil has just been changed and that the engine oil is very black because the car has not been used for a long duration of time. Furthermore, when I drive my car more often and the oil change on time the color will return back to normal and the technician has told me that the black coloration will not affect the car’s performance. Also he said that the Civic car is unable to change the original battery connector. I was wondering if both of these statements provided to me by my technician were true and if you were able to provide me with any other reasons as to why the engine coloration would be black.
Thank you for your time, your help will be greatly appreciated! Happy New year!
李进师傅你好，我最近买了一辆2004款本田思域，里数是16,730公里。我发现这辆车的发动机油颜色非常黑。我的技术人员告诉我，机油是刚过了的，机油很黑是因为这辆车已经长时间没有使用过。此外，当我开车几次后，机油颜色便恢复正常，技术人员还告诉我，黑色机油不会影响汽车的性能。他还表示，思域是无法更换原装电池连接器。我想知道技术人员向我提供的这两个讯息是否属实，并且是否能够提供任何原因，为什么发动机颜色是黑色的？
感谢您的时间，您的帮助将不胜感激！
李进答：Hi Dave, All motor oil contains cleaning agent additive required by the API(American Petroleum Institute) and SAE (Society of Automotive Engineers).The motor oil should be clear and golden color when first changed. If you open a can or bottle of motor oil the color is clear and golden.
However, as the engine operates, the motor oil cleaning agent will continue to collect and neutralize the harmful chemical byproducts from the combustion within the engine, including soots, and other hydrocarbon compounds, which will cause the oil gradually change color and darken. As long as you change motor oil according to the car manufacturer’s requirement (usually for regular motor oil it is every six months or 6,000 miles whichever comes first, or for synthetic motor oil it is every 12 months or 12000 miles whichever comes first.)
Always change oil filter with every oil change, and stick to original OEM oil filter as much as you can, avoid cheap oil filter.
Dave你好，所有机油含有API所需的清洁剂添加剂（美国石油学会）和SAE（汽车工程师协会）。第一次更换时机油应该是清澈的金黄色。如果你打开一罐或一瓶机油，颜色清晰而金黄。
但是，当发动机运转时，机油清洁剂将会发挥作用继续收集和中和有害的化学副产品，包括煤烟和其他碳氢化合物化合物，这会导致机油逐渐变色并变暗。只要你根据汽车制造商的情况更换机油要求（普通机油通常每六个月或6,000英里进行一次，以先到者为准，或者合成机油是每12个月或12,000英里，以先到者为准。）
每次更换机油时都要更换机油滤清器，并尽可能使用原装OEM机油及过滤器，避免使用廉价的机油及过滤器。
李进
具三十余年汽车维修保养经验，对汽车买卖也很熟悉。
如果您有汽车维修与保养方面的问题，欢迎发信至car_qna@epochtimes.com，本报将转发李进解答。来信请注明汽车型号、牌子及年份。◇
