What is the oil capacity of a 2006 Honda trx500fa ATV?

The oil capacity of a 2006 Honda TRX500FA ATV is approximately 2.5 quarts (or 2.4 liters) when using the standard oil filter. If you are changing the oil without replacing the filter, the capacity is slightly less, around 2.3 quarts (or 2.2 liters). Always refer to the owner's manual for the most accurate information and recommendations.