SHELL回覆: It depends on the construction of the scooter. Most bikes and scooter use the same oil for the lubrication of the engine AND also for the gear box (where passenger cars have a separate oil carter for engine oil and gear box oil). Gear boxes are very “sensitive” towards the friction coefficient of the oil. If this is not the correct level, switching gears will be to “brutal” or they will slip.
Because passenger car engine oils don’t have to lubricate gearboxes, there is no additive added to optimize the friction coefficient. In bike and scooter oils, there is a special additive added to make the friction coefficient adapted for the smooth working of the gear box. The API specification only takes care of the engine oil specifications. The Jaso takes account of engine AND gearbox lubrication.
So in answer to your question : If the engine and gear box lubrication is using 1 oil (in most cases), it’s better to use dedicated oil for bikes : in this case Shell Advance 4T Ultra 10W40. Using Helix will have an influence on smoothly switching gears. This oil is JASO specified.
If the engine oil is separate from the gearbox lubrication, Helix is fine.