Oil and Maintenance Guide for 2009 Yamaha YFZ450 450
Before You Service the Engine
Routine maintenance for your 2009 Yamaha YFZ450 450 requires using the right lubricant and carefully checking the level after refilling. Check your specific refill and level-check instructions before removing the drain plug, as a published capacity might not match the actual amount needed after a routine drain.
How much oil does a 2009 Yamaha YFZ450 450 take?
The engine oil capacity is listed at 1.95 quarts. Because the amount added during a routine drain may differ from this figure, follow the proper level-check procedure when refilling.
What kind of oil does a 2009 Yamaha YFZ450 450 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.
Does synthetic oil automatically mean an ATV can go longer between oil changes?
No. Your oil change interval depends on your specific engine, operating conditions, and manufacturer requirements. Using a synthetic product does not mean this model requires longer service intervals.

