Honda TRX450R models from 2004-2009 hold 1.2 quarts (1.1 liters) of oil without changing the filter and 1.3 quarts (1.2 liters) with changing the filter.
Honda TRX450R models from 2010-2021 hold 1.3 quarts (1.2 liters) of oil.
Recommended Oil Weight
The recommended oil weight for Honda TRX450R is 10W-40. This is the oil weight specified in the owner's manual for the TRX450R and is suitable for most operating conditions.
However, in very cold climates, a lighter oil such as 5W-30 or 0W-40 may be used to improve cold-weather starting and engine protection. In extremely hot climates, a heavier oil such as 20W-50 may be used to provide increased engine protection.
It's important to use a high-quality oil specifically formulated for 4-stroke dirt bike or ATV engines. These oils contain the necessary additives to protect your engine from wear, corrosion, and other damage.
