Originally Posted by OVERKILL
Originally Posted by OilUzer
Originally Posted by PimTac
So a 5w is thicker than a 0w? I'm having difficulty grasping this.
5W will have higher viscosity (cSt) relative to a 0W at cold(er) temperatures ... Since we are talking about cold start/operation and before the oil has reached nominal operating temperatures.
Not always, it depends on what temperature you are looking at. M1 0w-40 is heavier than any GF-5 5w-30 at all temperatures much above where the W-rating is tested, at temperature at which very few people here will be starting their vehicle.
I assume it depends on the oil family or a specific temperature or maybe x40 vs. x30 or the base oil can play a role ... Maybe it can't be generalized to include all oils and all "cold" temperatures ... however i recently compared the viscosity of several xW30 (x=0,5,10) in the same oil family and near freezing and the 10W's had higher viscosity that the 5W's and the 5W's had higher viscosity than the 0W's.
Originally Posted by OilUzer
Originally Posted by PimTac
So a 5w is thicker than a 0w? I'm having difficulty grasping this.
5W will have higher viscosity (cSt) relative to a 0W at cold(er) temperatures ... Since we are talking about cold start/operation and before the oil has reached nominal operating temperatures.
Not always, it depends on what temperature you are looking at. M1 0w-40 is heavier than any GF-5 5w-30 at all temperatures much above where the W-rating is tested, at temperature at which very few people here will be starting their vehicle.
I assume it depends on the oil family or a specific temperature or maybe x40 vs. x30 or the base oil can play a role ... Maybe it can't be generalized to include all oils and all "cold" temperatures ... however i recently compared the viscosity of several xW30 (x=0,5,10) in the same oil family and near freezing and the 10W's had higher viscosity that the 5W's and the 5W's had higher viscosity than the 0W's.