- Joined
- May 24, 2023
- Messages
- 130
Yes, as I mentioned above, an old can of Mobil 1 5W-20 from 1975 would have to be tested for KV100 and HTHS. Until then, nobody knows what it was, because it was never published since HTHS specs didn't exist in 1975. Post up the official test data on that 1975 oil, when we'll know.
Certainly, I understand your perspective. However, considering the viscosity of 7.5 cSt, it is reasonable to estimate that my numbers (2.6-2.8 cP) are in close proximity (who knows? )