Any of the following would qualify as a 75W80:
C. The next higher viscosity MTL group is in the 8.0 cSt to 8.9 cSt Range would be:
1. Castrol Syntrans V FE (8.0cSt)
2. Redline DCTF Dual Clutch Transmission Fluid (8.1 cSt)
3. The next higher viscosity would be BG Synchroshift II (8.2 cSt)
4. RAVENOL PSA
D. The next higher viscosity MTL group in the 9.0 to 9.5 cSt range is (SAE 75W80):
1. Mopar Type MS-9417 MTL 9.0 cSt
2. Valvoline MTF Part Number 811095 9.2 cSt
3. Pennzoil Synchromesh 9.3 cSt
4. RAVENOL PSA 9.5 cSt
5. RAVENOL SSG 9.5 cSt
E. The next group of MTL’s are in the 9.6 to 10.X cSt range (SAE 75W80):
1. Redline MTL 75W80
2. Amsoil MTF (9.7 cSt)
3. GM Synchromesh’s
4. Volvo MTF 645
5. Fuchs TITAN SINTOFLUID SAE 75W-80 synthetic MTF (Carries a GL-5 rating as well)
6. Lodexol (Morris Lubricants) MTF
7. Motylgear 75W-80
Recommendation: Buy a quart of the Nissan fluid and have it analyzed for its viscosity @ 100C and we can narrow down the recommendations.
If you look at the ridiculous SAE viscosity range of a 75W80 it can mean a large range in viscosities.
https://www.bobistheoilguy.com/viscosity-charts/