Triumph Thunderbird Commander Handbook page 126

Specifications
Tightening Torques
Oil Filter . . . . . . . . . . . . . . . . . .
Sump Plug. . . . . . . . . . . . . . . .
Spark Plug . . . . . . . . . . . . . . . .
Fluids and Lubricants
Engine Oil . . . . . . . . . . . . . . . .
Brake Fluid. . . . . . . . . . . . . . . .
Coolant . . . . . . . . . . . . . . . . . .
Bearings and Pivots. . . . . . . . .
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Thunderbird Commander and Thunderbird LT
10 Nm (7 lbs ft)
25 Nm (18 lbs ft)
20 Nm (15 lbs ft)
Semi or fully synthetic 10W/40 or 10W/50 motorcycle
engine oil which meets specification API SH (or higher) and
JASO MA, such as Castrol Power 1 Racing 4T 10W-40
(fully synthetic) engine oil, sold as Castrol Power RS
Racing 4T 10W-40 (fully synthetic) in some countries
DOT 4 Brake Fluid
Triumph HD4X Hybrid OAT coolant (pre-mixed)
Grease to NLGI 2 specification