How much gear oil should be added to an electric four-wheel vehicle?
2 Answers
Add 100 milliliters at a time. Gear oil mainly refers to the lubricating oil for transmissions and rear axles. It differs from engine oil in terms of usage conditions, composition, and performance characteristics. Gear oil primarily serves to lubricate gears and bearings, prevent wear and rust, and assist in heat dissipation for the gears. The functions of gear oil are as follows: Lubricating the transmission system: Reduces wear on gears and other moving parts, ensures normal operation of the transmission system, and extends service life. Cooling transmission components: During gear transmission, a significant amount of heat is generated due to friction between gear surfaces. If not dissipated in time, it can lead to localized high temperatures on the gear surfaces, and in severe cases, cause burning and adhesion.
As someone who frequently tinkers with my electric vehicle, I believe gear oil is something to take seriously. Gear oil protects the transmission system and reduces wear—skipping it is a surefire way to regret later. The amount to add depends on your vehicle type. For small four-wheelers like mobility scooters or golf carts, the manual typically recommends between 50ml and 150ml. Don’t underestimate this quantity—overfilling can cause spills, pollute the environment, or damage components, while underfilling leads to excessive gear friction and shortened lifespan. Before adding, I always locate the oil level inspection hole—usually a small screw on the side—and unscrew it to check that the oil level sits right in the middle of the hole. When adding manually, use a funnel and pour slowly, checking the level as you go. The key is not to exceed the MAX line, as temperature changes can cause the oil to expand and foam. Additionally, I recommend checking the oil quality every six months. If it’s discolored or contains debris, replace it immediately—routine maintenance saves costly repairs down the line. Remember, always follow the manufacturer’s guidelines for any vehicle; cutting corners can lead to avoidable problems.
