OVERKILL
$100 Site Donor 2021
Originally Posted By: kschachn
Well, not a surprise from the physics of oil, but from a marketing standpoint. I think it is easy to think that any oil marketed as a 0W-something is superior for low temperatures but that's not how the grading system works. Clearly from this example this 0W-40 is far thicker at low temperatures than their 0W-30 product. And a lot more than their 5W-30 as well.
Not so fast. In order to qualify as a 0w-xx an oil has to be below the maximum limits for CCS and MRV at -35C and -40C respectively. M1 0w-40 is thinner at BOTH of these temperatures than their 5w-30, otherwise their 5w-30 would be a 0w-30
This became somewhat relevant to me the other morning when I started my truck with a 5w-30 in the pan (PU 5w-30) @ -30C instead of the AFE 0w-30 I had in there previously, which would have been a solid 1,000cP lighter AT LEAST, than the PU 5w-30, which was 4,000cP.
Well, not a surprise from the physics of oil, but from a marketing standpoint. I think it is easy to think that any oil marketed as a 0W-something is superior for low temperatures but that's not how the grading system works. Clearly from this example this 0W-40 is far thicker at low temperatures than their 0W-30 product. And a lot more than their 5W-30 as well.
Not so fast. In order to qualify as a 0w-xx an oil has to be below the maximum limits for CCS and MRV at -35C and -40C respectively. M1 0w-40 is thinner at BOTH of these temperatures than their 5w-30, otherwise their 5w-30 would be a 0w-30
This became somewhat relevant to me the other morning when I started my truck with a 5w-30 in the pan (PU 5w-30) @ -30C instead of the AFE 0w-30 I had in there previously, which would have been a solid 1,000cP lighter AT LEAST, than the PU 5w-30, which was 4,000cP.