如果你的车主手册上写着变速箱油终身免更换，那我劝你赶紧合上手册，因为终身这个词可能是汽车行业里最成功的文字游戏。

　　If your car owner's manual states that the transmission fluid is not required to be changed for life, I urge you to quickly close the manual, as the term "for life" may be the most successful wordplay in the automotive industry.

　　厂家所谓的终身指的是车辆的设计，寿命周期通常是10年或24万公里左右，而不是你想的开到报废。而且这10年24万公里也是有门槛的。

　　The so-called "lifelong" guarantee by the manufacturer refers to the design and lifespan of the vehicle, which is typically around 10 years or 240,000 kilometers, not to the extent of driving it until it's scrapped. Furthermore, there are thresholds for these 10 years and 240,000 kilometers.

　　工程师的真实逻辑是在理想工况下，油液的理论寿命确实很长，但理想工况不包括你每天要面对的拥堵，高温和高负荷以及金属正常磨损所产生的碎屑。

　　The true logic of engineers is that under ideal operating conditions, the theoretical lifespan of oil is indeed very long. However, ideal operating conditions do not include the congestion, high temperatures, and high loads you face every day, as well as the debris generated by normal metal wear and tear.

　　这些都在默默改变终身的定义，更重要的是它背后有个潜台词，在厂家的保修期内它大概率不会因为油液问题而坏。

　　All of these are silently changing the definition of "lifelong". More importantly, there is an underlying message behind it: during the manufacturer's warranty period, it is highly unlikely to break down due to oil issues.

　　但保修期基本都在10万公里或3年内出了保修期，那就是你和维修厂之间的事了。

　　However, once the warranty period, which is typically within 100,000 kilometers or 3 years, has expired, it becomes a matter between you and the repair shop.

　　如果你没在所谓的理想状态下或保修期内用车，那长期不换油会导致两个必然的结果;

　　油液会劣化。因为变速箱的工作温度可达到90到120摄氏度，长期高温下油液的清洁、润滑和散热性能就会衰减，衰减成劣化油液就会形成油泥。油泥会堵塞阀体，这就是换挡顿挫冲击的主要原因。

　　If you don't use your vehicle under the so-called ideal conditions or within the warranty period, long-term failure to change the oil will lead to two inevitable outcomes: The oil will deteriorate. Because the operating temperature of the transmission can reach 90 to 120 degrees Celsius, the cleaning, lubricating, and heat dissipation properties of the oil will deteriorate under long-term high temperatures. The deteriorated oil will form oil sludge. Oil sludge can block the valve body, which is the main cause of shift shock and impact.

　　磨损加剧变速箱只要工作齿轮和离合器片之间就会产生极其细微的金属碎屑，磨损下来的金属碎屑混在油里，就像砂纸一样不停的摩擦离合器和齿轮。

　　As the wear intensifies, extremely fine metal debris will be generated between the working gear and the clutch plate of the gearbox. The metal debris that has worn off mixes with the oil, acting like sandpaper and constantly rubbing against the clutch and gears.

　　这也是变速箱大修的主要原因。一次大修变速箱的费用至少是换油费用的十倍，你省下的几百块钱油钱都是在给未来上万块的维修费添砖加瓦。

　　This is also the primary reason for overhauling the gearbox. The cost of overhauling a gearbox is at least ten times the cost of changing the oil. The few hundred dollars you save on oil money are just building blocks for tens of thousands of dollars in future maintenance costs.

　　那到底该怎么对待变速箱油呢？记住这三条：

　　第一看类型，CVT变速箱最娇贵，建议6到8万公里，严格更换AT或DCT变速箱。建议8到10万公里检查或更换。

　　So how should we treat transmission fluid? Remember these three points: First, consider the type. CVT transmissions are the most delicate, and it is recommended to strictly replace them after 60,000 to 80,000 kilometers. For AT or DCT transmissions, it is recommended to inspect or replace them after 80,000 to 100,000 kilometers.

　　第二一定要用机器循环换油，尽可能把旧油和杂质置换干净，而不是简单的重力放油。因为换油的目的主要是清理杂质。

　　Secondly, it is essential to use a machine for circulating oil change, ensuring that the old oil and impurities are fully replaced, rather than simply draining the oil by gravity. The primary purpose of oil change is to remove impurities.

　　第三务必使用厂家认证的原厂或同等标准油液型号不对，会损伤阀体。有的车主说换了变速箱油，感觉换挡顿挫，那是因为加了劣质油或修理厂操作不当。

　　Thirdly, it is imperative to use the original or equivalent standard oil certified by the manufacturer. Using the wrong oil model can damage the valve body. Some car owners complain that after changing the transmission fluid, the gear shifting feels jerky. This is due to the use of inferior oil or improper operation by the repair shop.

　　说到底汽车厂家所说的终身免维护，是在路况完美、温度恒定的实验室世界里。而我们每天面对的是堵车的烦躁，是尘土飞扬的工地，是夏天暴晒，冬天严寒的真实街道。

　　Ultimately, the "lifelong maintenance-free" claim made by car manufacturers is only valid in a laboratory setting with perfect road conditions and constant temperature. However, we face the daily hassles of traffic jams, dusty construction sites, and the realities of streets exposed to the scorching sun in summer and the bitter cold in winter.

　　所以真正懂车的人，不是盲目迷信手册，也不是胡乱焦虑，而是在理想和现实中掌握好那个养护的分寸。

　　Therefore, those who truly understand cars do not blindly rely on manuals or worry unnecessarily. Instead, they strike a balance between their ideals and reality when it comes to maintenance.

　　关注我，每天用车干货，让你的车越开越省心！

　　Follow me, and get daily tips on car use to make your driving experience more worry-free!

　　本文由 济南自动变速箱维修  友情奉献.更多有关的知识请点击  http://www.jnbsx.com/  真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is kindly contributed by Jinan Automatic Transmission Repair. For more relevant knowledge, please visit http://www.jnbsx.com/ with a sincere attitude. We will provide you with comprehensive services. More relevant knowledge will be contributed to you in succession. Please stay tuned