I'm really confused about this: I've used the Amsoil 5W-30 Synthetic since day 1 on my 2001 Honda Prelude and I'm very happy with it. People have been recommending the Series 2000 0W-30, but looking at the specs on Amsoil's site, the 5W-30 seems superior (higher kinematic visc.@100*C, lower Noack volatility, better 4-ball wear test, and the same TBN).
Here is my dilemma:
- Four-ball wear test
The spec for the Series 2000 0W-30 is 0.373mm at 150*C, 1800RPM, whereas the 5W-30 is 0.35mm at 75*C, 1200RPM. What gives, why do they have different testing procedures? Which is better?
- Noack volatility
The Noack volatility for the 0W-30 is 9.2@250*C, and for the 5W-30 it is 6.9@ an unspecified temperature. Do I assume it is also @250*C?
- Cold crank simulator
The 0W-30 is 2993@-30*C, whereas the 2555@-25*C. Why don't they specify the viscosity at the same temperature so one can make an informed decision.
-High Temperature/High Shear Viscosity cP
The 0W-30 is specified as 3.5@ unknown temperature, whereas the 5W-30 is 3.5@150*C. Should I assume the 0W-30 was measured at 150*C as well?
Maybe someone could shed some light on this?
Here is my dilemma:
- Four-ball wear test
The spec for the Series 2000 0W-30 is 0.373mm at 150*C, 1800RPM, whereas the 5W-30 is 0.35mm at 75*C, 1200RPM. What gives, why do they have different testing procedures? Which is better?
- Noack volatility
The Noack volatility for the 0W-30 is 9.2@250*C, and for the 5W-30 it is 6.9@ an unspecified temperature. Do I assume it is also @250*C?
- Cold crank simulator
The 0W-30 is 2993@-30*C, whereas the 2555@-25*C. Why don't they specify the viscosity at the same temperature so one can make an informed decision.
-High Temperature/High Shear Viscosity cP
The 0W-30 is specified as 3.5@ unknown temperature, whereas the 5W-30 is 3.5@150*C. Should I assume the 0W-30 was measured at 150*C as well?
Maybe someone could shed some light on this?