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5718 rear portal
- Thread starter richard_a
- Start date
- Joined
- Jul 5, 2003
- Messages
- 4,021
- Location
- Laag Zuthem
- First name
- Renze
Machinery:
1976 5718
1978 5718 35kmh: Work in progress
1967 3011
standard 80w/90 gear oil.
- Joined
- Jul 5, 2003
- Messages
- 4,021
- Location
- Laag Zuthem
- First name
- Renze
Machinery:
1976 5718
1978 5718 35kmh: Work in progress
1967 3011
Yes, STOU viscosity is measured at engine operating temperature, hence the much lower index number than the gear oil, which is measured at room temperature. These oils are about the same thickness.
80w/90 gear oil is better though, because it absorbs less humidity than a STOU oil. STOU oils can take more heat. When used in a transaxle, the STOU gets warm enough to keep the humitity out.
80w/90 is best, 15w/40 will work too but will age quicker in a cold gearcase.
80w/90 gear oil is better though, because it absorbs less humidity than a STOU oil. STOU oils can take more heat. When used in a transaxle, the STOU gets warm enough to keep the humitity out.
80w/90 is best, 15w/40 will work too but will age quicker in a cold gearcase.
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