
Yamaha JOG i tends to be quieter when using non-counterfeit oil, oil with appropriate viscosity, oil with stable performance across temperature variations, and high-grade branded engine oil. Below are relevant details: Introduction to Yamaha JOG i: The Yamaha JOG i is equipped with a 'Blue Core' engine. While it emphasizes fuel efficiency, its power output is impressive for a 125cc displacement scooter. It offers quick acceleration and strong low-end torque, outperforming even the DL250 in this aspect. However, the front suspension of the JOG i is notably subpar. Function of Engine Oil: Engine oil, also known as engine lubricant (English name: Engine oil), has a density of approximately 0.91×103 (kg/m3). It serves multiple functions including lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, as well as shock absorption. Often referred to as the 'blood' of an automobile, engine oil consists of base oil and additives. The base oil forms the primary component of lubricants, determining their fundamental properties, while additives compensate for and enhance the base oil's performance shortcomings, imparting new characteristics, making them a vital part of lubricants.

I've been using the Yamaha Cygnus i for commuting for almost three years, and I found that using 10W-40 full synthetic oil, such as Mobil or Shell brands, makes the engine quieter. This oil provides good lubrication, reduces engine friction, and naturally makes the sound much quieter, especially noticeable during startup and idling. The viscosity of the oil is crucial—oil that's too thin won't offer enough protection, while oil that's too thick increases resistance and makes the engine noisier. I recommend not skimping on this expense; although synthetic oil is more expensive, it lasts longer and reduces wear. Additionally, regular oil changes are essential—ideally every 2,500 to 3,000 kilometers—don't delay too long, as old oil thins out and increases noise. Also, check the air filter; if it's too dirty, it can affect engine breathing and indirectly amplify noise. When riding, avoid aggressive throttle inputs—gentler riding also helps reduce noise. In short, choosing the right oil and maintaining good habits will make the engine sound much smoother.

After two years with the Jog-i, I've learned a few tricks: Using 10W-30 full synthetic or semi-synthetic oil makes the engine significantly quieter. The right viscosity forms an oil film to cushion vibrations, keeping the engine silent. Don't casually switch from Yamaha's recommended oil certifications like JASO MA, as it might backfire. I make it a habit to check the dipstick monthly – sufficient oil level ensures safety, while low levels mean immediate top-up. Don't underestimate oil; it doesn't just affect sound but protects the entire engine system. Before each ride, I gently tap the throttle a few times to ensure smooth operation and prevent sudden noises. Also, avoid modifying the exhaust or adding unnecessary accessories – the stock design is already well-balanced. Regular oil changes as a habit keep the overall sound under control.

As a beginner riding the Qiao Ge i, I was initially bothered by the loud engine noise. However, after switching to 10W-40 synthetic oil, it became noticeably quieter. Choosing engine oil is straightforward: opt for reputable brands like Castrol, and don't exceed the recommended viscosity. After trying several brands, I found synthetic oil works best, significantly reducing noise. Always change the oil when it turns black to ensure engine health and minimize extra noise. Don’t overlook chain lubrication—I regularly spray some oil to keep the transmission silent. Adjusting riding habits also helps: avoiding prolonged high RPMs makes the sound gentler. Simple maintenance ensures a smooth, worry-free daily commute.


