< p >这是一个有趣的问题,和生命周期排放分析可以给出很好的答案。显然有很多变量,所以一些基本假设。< / p > < p >我们开始建设和驾驶汽车排放出的二氧化碳当量。有各种各样的分析,但< a href = " https://www.lowcvp.org.uk/assets/workingdocuments/MC-P-11-15a%20Lifecycle%20emissions%20report.pdf " rel = " nofollow noreferrer " > < / >是一个我发现给以下值对于一个典型的汽油动力汽车的“典型”一生150000公里(93000英里):24000公斤的二氧化碳排放量,5600公斤的汽车的制造。< / p > < p >石油,我发现< a href = " https://pubs.acs.org/doi/pdf/10.1021/sc400182k " rel = " nofollow noreferrer " > < / >,使一系列13公斤2.5当量二氧化碳每加仑机油。低价值假设新油是用回收油、废油是送到回收商。更高的价值假设新的石油不是从回收的来源,和废油回收。最极端的例子,我们可以假设直馏油,并假设每行驶3000英里的时候更换一次油,而汽车持有4夸脱(1加仑)。使31日油汽车的生命周期的变化,使403公斤的当量二氧化碳从石油的变化。另一个完全合理的价值可能是承担回收和假设每7000英里换油导致33公斤二氧化碳排放量。< / p > < p >所以石油的变化贡献30到400公斤范围内随着汽车的生活,相比之下,24000公斤从建筑和驾驶汽车。 Skipping all oil changes in the most extreme case results in less than 2% reduction in total CO2e emissions. You can get almost exactly the same result by changing the oil every 7000 miles instead of every 3000, and by using recycled oil and making sure that your used oil is recycled. Even though you're not asking about it, I have to add that I think you have been exceptionally lucky if you drove 400,000 miles without changing the oil. I don't think you should expect that result again. And note that the emissions associated with building a car are 5600 kg - 10 to 100 times greater than the emissions contributed by changing the oil. If you don't change the oil in any car again for your entire life, and end up ruining just one car as a result, you will cause far more emissions than you saved.