Volvo 780 Owner's Manual page 111

1989 Volvo 780
Volvo recommends the use of fuel-economy-improving oils. When using these oils, the Volvo
recommended oil change intervals must be followed.
Volvo does not recommend oil additives as they can adversely affect the engine.
Capacity:(incl. oil filter)
780 GLE: 6.3 US qts. (6.0 liters)
780 Turbo: 4.0 US qts. (3.85 liters)
4.7 US qts. (4.45 liters) if oil cooler is drained.
SAE 15 W/40 oil is recommended for use in severe driving conditions which involve high oil
temperatures or excessive oil consumption (e.g. mountain driving with frequent deceleration, or high-
speed driving.)
Viscosity (stable ambient temperatures)
Automatic Transmission fluid Quality: ATF Dexron IID
Rear axle oil
Power steering fluid
Brake fluid
All specifications are subject to change without notice.
pg. 111 Specifications
Electrical system
12 V, negative ground.
Voltage-controlled alternator. Single-wire system with chassis and engine used as conductors.
Voltage
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Quality: API-GL-5(MIL-L-
2105 B or C) SAE 90
Quality: ATF
Brake fluid type: DOT 4
12V
Capacity: 7.9 qts. (7.5 liters)
Capacity: 1.7 qts. (1.6 liters)
Capacity: 780 Turbo: 1.05 US qts.
(1.0 liters)
780 GLE: 0.7 US qt.( 0.7 liter )
Capacity: 0.63 US qt. (0.6 liter)