The engine oil capacity for a standard 2018 Gold Wing GL1800 is 4.5 quarts (4.3 liters) when performing a full oil change with the filter. If you have the DCT (Dual Clutch Transmission) version, the bike uses separate transmission oil in addition to the engine oil, so total oil capacity depends on your configuration and manual guidance.
Engine oil capacity
The core figure most riders need is the engine oil capacity for the GL1800's 2018 model year. For non-DCT bikes, the engine oil capacity is 4.5 quarts (4.3 liters) including the oil filter during a standard change.
Before listing the key figures, note that the following is focused on engine oil for conventional (non-DCT) models; DCT variants have a separate transmission oil requirement.
- Engine oil capacity (including filter): 4.5 quarts (4.3 liters)
Concluding summary for this portion: plan for about 4.5 quarts of engine oil when performing a standard oil change on a non-DCT 2018 Gold Wing GL1800, including a new filter.
DCT and other oil considerations
For Gold Wing models equipped with Honda's DCT, there is a separate transmission oil requirement. The engine oil amount above does not include the DCT fluid. Exact DCT capacity and service intervals are specified in the owner's manual for your vehicle's VIN and market, so consult that manual for precise figures.
Practical maintenance notes
Always follow the oil grade and specification recommended in your owner's manual, warm the engine before draining, replace the oil filter, and recheck the level after the engine runs and cools. If your bike has DCT, ensure you perform the transmission oil service as directed alongside the engine oil change.
Summary
The 2018 Honda Gold Wing's engine oil capacity is 4.5 quarts (4.3 liters) including the filter for standard, non-DCT models. DCT-equipped variants require a separate transmission oil and different maintenance steps. Always verify the exact capacities and procedures for your specific bike in the owner's manual.