Oil and Maintenance Guide for 2004 Honda FourTrax Foreman Rubicon 500
Before You Service the Engine
For the 2004 Honda FourTrax Foreman Rubicon 500, 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.
What type of oil does a 2004 Honda FourTrax Foreman Rubicon 500 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.
How much oil does a 2004 Honda FourTrax Foreman Rubicon 500 take?
The available engine-oil capacity figure is 4.86 quarts. The amount added during a routine drain may differ from the listed capacity; use the correct level-check procedure when refilling.
Why does four-stroke engine oil need the right application rating?
Engine oils differ in additive packages and friction characteristics. Some powersports engines share oil with a wet clutch or transmission, so matching the manufacturer’s oil requirements matters in addition to viscosity. This listing does not by itself confirm the clutch design.

