Honda Goldwing GL1800 2019 Owner's Manual page 163

Engine Oil
Engine oil consumption varies and oil quality
deteriorates according to riding conditions
and time elapsed.
Check the engine oil level regularly, and add
the recommended engine oil if necessary.
Dirty oil or old oil should be changed as soon
as possible.
❙
Selecting the Engine Oil
For recommended engine oil, see
"Specifications." P. 253, 255
2
If you use non-Honda engine oil, check the
label to make sure that the oil satisfies all of
the following standards:
●
JASO T 903 standard* 1 : MA
●
SAE standard* 2 : 10W-30
●
API classification* 3 : SG or higher
*1. The JASO T 903 standard is an index for engine
oils for 4-stroke vehicle engines. There are two
classes: MA and MB. For example, the
following label shows the MA classification.
Oil code
Oil classification
The SAE standard grades oils by their viscosity.
*2.
*3. The API classification specifies the quality and
performance rating of engine oils. Use SG or
higher oils, excluding oils marked as "Energy
Conserving" or "Resource Conserving" on the
circular API service symbol.
Not recommended Recommended
Maintenance Fundamentals
Brake Fluid (Clutch Fluid)
Do not add or replace brake fluid, except in an
emergency. Use only fresh brake fluid from a
sealed container. If you do add fluid, have the
brake and clutch system serviced by your
dealer as soon as possible.
NOTICE
Brake fluid can damage plastic and painted surfaces.
Wipe up spills immediately and wash thoroughly.
Recommended brake fluid:
Honda DOT 4 Brake Fluid or equivalent
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