Reply to "understanding Technical Datasheets.."

quote:
Vis @ 100c cSt
Redline = 15.1
Castol = 13.5
Elf = 14.3

40 wt has a vis range and all above are in that range higher is thicker

Viscosity Index
Redline = 170
Elf = 160
Castrol = N/a (no value given)

Viscosity index is a mesurw of how much a oil thins as it gets hot normally higher is better meaning LESS thinning out when hot.

High Temp High Shear Viscosity
Redline = 4.6
Castrol = 3.7
Elf = Not provided

HTHS is a viscosoty mesurement at a high temp with a high shear higher is a thicker oil which will lead to better wear protection BUT also a thicker oil will slightly reduce gas mileage.

All are good oils best advice is change out routinely since ALL oils will start to get "dirty" and breakdown as soon as they are put in.
bruce
bruce

1/9/0711:25 PM

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