Oil and Maintenance Guide for 2015 Kymco Mongoose 90S 89
Before You Service the Engine
For the 2015 Kymco Mongoose 90S 89, planning an engine service involves checking the correct lubricant application and following the proper refill procedure. Before removing the drain plug, identify the correct refill and level-check procedure; a published capacity does not necessarily equal the amount needed after a routine drain.
Transmission and Drivetrain
For the transmission or drivetrain, the application results include Synthetic ATV/UTV Transmission & Differential Fluid. Confirm which component each product serves before adding fluid.
What type of oil does a 2015 Kymco Mongoose 90S 89 take?
The engine-oil viscosity shown for this model is 10W-40. The available oil-product listings include 10W-40 Synthetic ATV/UTV Engine Oil. For a service, choose oil that meets the engine’s actual application requirements, not just a product name.

