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WELLS
Xiao Han on Lubrication—Mixing Old and New Motor Oil? The Consequences Can Be Severe.
Some car owners, when they find their engine oil is low, top it up by mixing in leftover oil of different brands and viscosities, assuming, “It’s all engine oil—mixing them shouldn’t be a problem.” This notion is profoundly mistaken. Mixing oils with different formulations and base stocks can trigger a cascade of adverse reactions, which, in severe cases, can even lead to complete engine failure. Today, we’ll discuss the dangers of blending oils and the proper way to handle this issue.
07-22
2026
Xiao Han on Lubrication—Is Idle Vibration and High Fuel Consumption Caused by the Oil? Replace the Oil First, Then Conduct a Diagnosis.
Recently, many car owners have reported that their engines idle roughly, acceleration feels sluggish, and fuel consumption has inexplicably risen. After taking their cars to a shop, they’re often advised to clean the throttle body, flush the fuel injectors, and remove carbon deposits—resulting in a long list of services and hefty bills, yet the problems remain unresolved. In fact, in many cases, the root cause isn’t a major mechanical issue at all—it’s simply poor‑quality engine oil. Today, let’s explore why engine抖动 and high fuel consumption should first be traced back to the oil.
07-15
Xiao Han on Lubrication — How to Change Your Transmission Fluid Without Wasting Money
When it comes to changing their transmission fluid, many car owners find themselves torn: should they opt for a gravity‑drain method or a flush‑and‑circulate system? Some claim the latter delivers a cleaner job, while others argue that the former saves money and hassle. Still others warn, “The transmission will fail after the change.” In reality, the issue isn’t the method itself—it’s choosing the wrong approach for your vehicle’s specific condition. Today, we’ll lay out the differences between these two methods and the scenarios where each is best suited, helping you change your fluid without harming your car or wasting money.
07-08
Xiao Han on Lubrication — When to Change Your Engine Oil
Many car owners have a habit: when they pull out the oil dipstick and see that the oil has turned black, they immediately panic, assuming the oil is bad or degraded, and rush to replace it. Today, Xiao Han is here to set the record straight: blackened oil isn’t necessarily a problem—it actually means the oil is doing its job. Recently, on the “Boss Talks Lubrication” video channel, I addressed this very issue in detail. So let’s dive deeper today—don’t let yourself be misled into changing your oil prematurely and wasting money.
07-01
Xiao Han on Lubrication—Easily Choose the Right Oil Viscosity
Many car owners get confused when they see designations like “0W‑20, 5W‑30, 10W‑40” on oil bottles, unsure which one to choose. Picking the wrong grade can not only increase fuel consumption but also damage your engine. Recently, on the “Boss Talks Lubrication” video channel, General Manager Xiao Han thoroughly explained how to select the right viscosity. Today, we’ll dive deeper into the topic to help you fully understand.
06-24
The all-new, upgraded Oil Assistant is here—oil checks are now even more accurate!
Recently, many of you have left messages in the comments section: “Why can’t I use the old Oil‑Usage Assistant anymore? Is there a problem?” To all of you: the previous version has fulfilled its purpose and has been officially retired. In its place comes a completely revamped Oil‑Usage Assistant, now fully available! It’s more accurate, more comprehensive, and easier to use than the old version. Today, we’ll walk you through it in detail.
06-17
