There are many consumables in cars, such as engine oil, brake fluid, antifreeze, wiper water, etc. Car maintenance cannot be completely based on the user manual, because each car is in a different environment. One car is often driven in a dusty area, and the other car is driven in a clean air area every day. The maintenance time required for the two cars will inevitably be the same, depending on the actual situation. Therefore, whether to replace them during car maintenance is one thing, But it must be checked by the maintenance technician.

機油是發動機里必須用的潤滑油，每一款車對機油的性能要求不同，越是豪華車要求越明確，所以，豪華車輛都是用指定類型的機油，不能亂用，例如，寶馬汽油車用0W30全合成機油；寶馬M型運動型車就用M型特殊機油，如果寶馬車輛在使用過程中沒有加正確的機油型號，會對發動機引擎造成損害。具體到多少換機油，根據使用手冊要求來就好。

Engine oil is a lubricating oil that must be used in the engine. Each car has different performance requirements for engine oil, and the more luxurious the car, the clearer the requirements. Therefore, luxury vehicles use specified types of engine oil and cannot be used indiscriminately. For example, BMW gasoline cars use 0W30 fully synthetic engine oil; The BMW M-type sports car uses M-type special oil. If the BMW vehicle does not add the correct oil type during use, it will cause damage to the engine. The specific mileage for changing the oil should be determined according to the instructions in the user manual.

發動機的溫度是由防凍液來降溫的，水泵把防凍液壓入引擎的每條管道，通過防凍液傳溫來降低發動機溫度，汽車工作需要達到一個特定溫度，在212華氏度左右，防凍液就是這樣的一個媒介，一般是5年或5萬英里換一次。寶馬汽車有專用防凍液，為什么別的車能用水，而寶馬車不行，不是說不行，水在高溫時會產生水垢，長期使用會降低對發動機的降溫效果。

The temperature of the engine is cooled by antifreeze, which is hydraulically injected into each pipeline of the engine by a water pump. The engine temperature is lowered through the transmission of antifreeze, and the car needs to reach a specific temperature, around 212 degrees Fahrenheit. Antifreeze is such a medium, usually changed every 5 years or 50000 miles. BMW cars have specialized antifreeze, why can other cars use water while BMW cars cannot? It's not that it doesn't work. Water can produce scale at high temperatures, and long-term use can reduce the cooling effect on the engine.

變速箱油通常3萬英里換一次，和發動機油一樣，變速箱油同樣是要用專用型號，但寶馬車會注明使用了長效變速箱油，如果沒有發生漏油情況，我們是不需要換的。但是要換一定要換專用油，因為變速箱齒輪需要油來潤滑，以及達到緊配合作用，不同型號油會損害變速箱使用壽命。

The transmission oil is usually changed every 30000 miles. Like the engine oil, the transmission oil also needs to be a specialized model, but BMW cars will indicate the use of long-lasting transmission oil. If there is no oil leakage, we do not need to change it. But if you want to change it, you must change the special oil because the gearbox gears need oil to lubricate and achieve tight fitting. Different types of oil can damage the service life of the gearbox.

剎車油是大家很關注的，汽車沒剎車或剎車不好都無法想象，寶馬車使用的是DOT4的剎車油，這種油有很高的沸點特性，剎車油在使用過程中會產生水蒸氣揮發，建議寶馬車輛每兩年換一次，不過要根據車輛使用環境而定，要是車經常在灰塵大的地方開，不可避免灰塵會進入儲油室中，檢查發現剎車油里有很多灰塵，即使不到2年時間，也應該換掉。

Brake oil is of great concern to everyone. It is unimaginable that cars do not have brakes or brakes are not good. BMW cars use DOT4 brake oil, which has a high boiling point characteristic. During use, brake oil will produce water vapor evaporation. It is recommended to change BMW vehicles every two years, but it depends on the vehicle's usage environment. If the car is frequently driven in dusty areas, dust will inevitably enter the oil storage chamber, Upon inspection, it was found that there is a lot of dust in the brake fluid, which should be replaced even if it takes less than 2 years.