
The Jog i uses 10w40 engine oil. Below are the specific details of the Yamaha Jog i125: 1. Dimensions: The Yamaha Jog i125 is a scooter produced by Yamaha. Its length, width, and height are 18056851050mm, with a seat height of 740mm, a wheelbase of 1275mm, and a minimum ground clearance of 115mm. 2. Engine parameters: The Yamaha Jog i125 is equipped with a single-cylinder, air-cooled, four-stroke engine with a displacement of 125ml, a maximum power of 6.1kw, a maximum torque of 9.7N·m, and a compression ratio of 11.0:1. It is paired with a V-belt continuously variable transmission.

I live in the north where winters are bitterly cold. I've been riding my Jog i for several years and always use 5W30 oil. The lower viscosity ensures smooth cold starts even in sub-zero temperatures, with quick engine lubrication and no gear dragging issues. If I do more outdoor activities in summer, I switch to 10W40 for better high-temperature protection. 5W30 also helps save fuel, making it ideal for city commuting with lower consumption, perfect for daily short trips. Always choose quality full synthetic oil—don't compromise on cheap brands. Remember, in cold regions, thicker oils like 10W40 become too viscous, making startups difficult and harming engine longevity. For regular maintenance, change the oil every 5,000 km to keep the system clean—safe riding is what matters most.

As a motorcycle enthusiast from the south where high temperatures are common, the Yamaha Cygnus i is better suited with 10W40 oil. High-viscosity oil maintains lubricity in hot weather, ensuring quieter engine operation and better wear protection. When riding on highways in summer with temperatures soaring to 40°C, 5W30 oil tends to thin out, leading to unstable oil pressure and abnormal noises. Although 10W40 may slightly increase fuel consumption, it provides crucial protection for engine components, enhancing durability. Remember to regularly check oil levels to prevent excessive evaporation during long rides. This recommendation applies to both new and older bikes—avoid mixing different oil types. Opt for certified synthetic oil and pair it with routine cleaning for a more worry-free riding experience.

As a budget-conscious rider, I only choose 5W30 for my Yamaha Jog-i. It's way more fuel-efficient for city riding. The lower viscosity means less engine resistance, quicker starts, and stable power output, saving me dozens of yuan on gas each month. While 10W40 offers better protection at high temperatures, it's unnecessary since I mostly do short urban commutes. Always opt for synthetic oil—longer maintenance intervals mean lower costs. Just avoid low-quality oils that might contain impurities and change it regularly. Bottom line: cost-effectiveness reigns supreme.


