Why Do 4S Shops Mostly Use Gravity Oil Change?

[MacEmerson]

4S shops do not necessarily all use gravity oil change; some employ circulating machine oil change. The advantage of gravity oil change lies in its relatively lower cost, thereby saving maintenance expenses to some extent. The drawback is that it cannot completely drain the oil from the transmission, nor does it effectively clean the residual impurities inside the transmission. On the other hand, circulating machine oil change, though more expensive, offers better cleaning effects for the transmission's interior. Extended content: 1. Pros and cons of gravity oil change: This method is simple to operate, uses less oil, and is relatively more cost-effective. However, it leaves a significant amount of old oil residue, which mixes with the new oil upon refilling, thereby reducing the transmission's maintenance cycle. 2. Pros and cons of circulating oil change: This method leaves very little old oil residue in the transmission, minimizing secondary contamination of the new oil and allowing the transmission to operate in a better environment. However, it consumes more oil and is more expensive.