Fluids & Lubrication

These specs were taken from International Harvester's Service Manual for a late model Scout II. This is meant to be a general guideline. Actual values may vary depending on specific models, please double check fluids for your specific application. 

Engine Oil:

Temps 20°  120°F:
SAE 30, 10W-30, 10W-40, 20W-40, 20W30 

Temps 0° 90°F:
SAE 20W, 10W-30, 10W-40, 20W-40, 20W30

Temps -10° – 70°F:
SAE 10W, 10W-30, 10W-40

Ernie Bisio's Choice:
Straight 40 Weight 

Engine Coolant:

Typically Green, various colors should not be mixed, unless otherwise noted. Mix with distilled water at a ratio appropriate for your climate range. 

Power Steering:

1.42 L
GM power steering fluid

Manual Steering:

SAE 85W-140 gear oil

Brake fluid:




Manual Transmission (T-19, T-18):

3.3 L

Temps below 0ºF: 
Mineral Gear Oil SAE 80 (GL-1)

Temps below 32ºF: 
Mineral Gear Oil SAE 90 (GL-1)

Temps above 32ºF: 
Mineral Gear Oil SAE 140 (GL-1)

Automatic Transmission (T727)

6 Quarts
Dextron Automatic Transmission Fluid

Transfer Case (Dana 18, 20, 300):

1.65 L

Temps below 0ºF: 
Straight Mineral Oil SAE 80

Temps above 0ºF: 
Straight Mineral Oil SAE 80W-90

Temps consistent above 90ºF: 
Straight Mineral Oil SAE 90W-140

Transfer Case (TC-143 single speed):

Capacity: 0.94 L
Dextron Automatic Transmission Fluid  

Universal Joints (U-joints):

NLGI #2 equivalent, multipurpose grease

Wheel Bearing:

NLGI #2 equivalent, multipurpose grease

Front and Rear Differentials*:

Dana 30 Front: 1.2 L
Dana 44 Front: 2.1 L
Dana 44 Rear: 1.4 L

Normal Climate / Normal Load:
SAE 85W-140 or SAE 90 gear oil

Hot Climate / High Load:

SAE 140 gear oil

*For limited-slip use friction modifier additive.

If you have recommendations or corrections on information listed, please let us know on our contact page!