Which specification does Manual gearbox & axle oil need for the Opel Kapitän 2.8 (1966–1968)?

Manual gearbox & axle oil for the Opel Kapitän 2.8 (1966–1968): API GL4, DTFR 13B100.

Which specification does Automatic transmission fluid (ATF) need for the Opel Kapitän 2.8 (1966–1968)?

Automatic transmission fluid (ATF) for the Opel Kapitän 2.8 (1966–1968): Allison TES 389, Caterpillar TO-2.

Axle & differential oil for the Opel Kapitän 2.8 (1966–1968): 85W-90, API GL5, DTFR 12B100.

Brake fluid for the Opel Kapitän 2.8 (1966–1968): DOT 3, FMVSS 116 DOT 3.

Coolant & antifreeze for the Opel Kapitän 2.8 (1966–1968): G11, G12.

Power steering fluid for the Opel Kapitän 2.8 (1966–1968): 85W-90, API GL4, MIL-L 2105.

For the Opel Kapitän 2.8 (1966–1968), the manufacturer specifies motor oil 10W-30 (API SF), 20W-20 (API SJ), or 20W-50 (API SC, API SD, API SE).

Fluid	Requirement
Motor oil	10W-30: API SF20W-20: API SJ20W-50: API SC, API SD, API SE
Manual gearbox & axle oil	API GL4, DTFR 13B100
Automatic transmission fluid (ATF)	Allison TES 389, Caterpillar TO-2
Axle & differential oil	85W-90, API GL5, DTFR 12B100
Brake fluid	DOT 3, FMVSS 116 DOT 3
Coolant & antifreeze	G11, G12
Power steering fluid	85W-90, API GL4, MIL-L 2105