Oil and Maintenance Guide for 2018 Honda TRX 450 R/ER 449
Before You Service the Engine
For the 2018 Honda TRX 450 R/ER 449, planning an engine service involves checking the correct lubricant application and following the proper refill procedure. A catalog recommendation is a starting point rather than proof of every manufacturer requirement; consult the correct service instructions before adding fluid.
How much oil does a 2018 Honda TRX 450 R/ER 449 take?
The available engine-oil capacity figure is 0.73 quarts. The amount added during a routine drain may differ from the listed capacity; use the correct level-check procedure when refilling.
What does 10W-40 mean on an engine-oil label?
The number before W identifies the oil’s low-temperature viscosity grade, while the second number identifies its viscosity grade at operating temperature. The oil must also meet the engine manufacturer’s specifications.

