Oil and Maintenance Guide for 2013 Yamaha Grizzly 4x4 Auto 421
Before You Service the Engine
Before servicing the 2013 Yamaha Grizzly 4x4 Auto 421, confirm the lubricant requirements and prepare to verify the final fluid level. Use the proper level-check method for this machine, and verify product suitability instead of relying on a catalog name alone.
What type of oil does a 2013 Yamaha Grizzly 4x4 Auto 421 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, Formula 4-Stroke Power Sports Synthetic Motor Oil. For a service, choose oil that meets the engine’s actual application requirements, not just a product name.

