The lower the temperature that an oil is tested at, the higher it’s CCS viscosity number will be, and a 5 degree difference can actually have a pretty significant effect on that number.
Thus, IF the numbers you provided in your question above are correct and not typos, the first oil is CONSIDERABLY better than the second, at least in regards to cold weather cranking. This is because, if the first oil had been tested at -20 degrees vs -35 degrees, it’s CCS value would actually be much lower than it already is at 3808.
Since the second oil is already considerably higher at 5621, the gap between the two would likely be even greater if both oils were tested at the same temperature.
That being said, be careful with this. It is not uncommon for spec sheets to have typos. A 0w30 oil MUST be tested at -35 degrees and achieve a CCS value of LESS than 6200 cP in order to be classified as a 0w oil. So, it’s possible that your 0w30 oil which indicates it was tested at -20, may actually have been tested at the required -35, but the PDS was typed up incorrectly.
Either way, even if the second oil was tested at -35, if the 5621 cP number is correct, then, the first oil is still better in cold temps.
Of course, that doesn’t say anything about it’s performance in hot temps or other stressful conditions – just cold temps.
What are the requirements for a 0w30 oil if it is tested using the ASTM D2983 method? I was looking at the same company and one spec sheet was from 07 and the other 2011 and the one from 07 ccs was the 3808 @ -35 and on the 2011 sheet it said 5621 at -20….however on the 07 sheet the viscosity cP was tested at -40 (D2983) at 16,260 and on the 2011 sheet it says “viscosity cP @ -20 is 5621 but it has the (D5293) method listed…..maybe they meant to show it under the (D2983) method and typed it up wrong.
The D2983 test is not a CCS test, and they are not comparable. In fact, it’s generally not even used for motor oils, but moreso ATF and such. So, the two tests are not comparable at all.
If I were you, I’d contact the company directly to verify the numbers and/or to let them know of the error.
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The lower the temperature that an oil is tested at, the higher it’s CCS viscosity number will be, and a 5 degree difference can actually have a pretty significant effect on that number.
Thus, IF the numbers you provided in your question above are correct and not typos, the first oil is CONSIDERABLY better than the second, at least in regards to cold weather cranking. This is because, if the first oil had been tested at -20 degrees vs -35 degrees, it’s CCS value would actually be much lower than it already is at 3808.
Since the second oil is already considerably higher at 5621, the gap between the two would likely be even greater if both oils were tested at the same temperature.
That being said, be careful with this. It is not uncommon for spec sheets to have typos. A 0w30 oil MUST be tested at -35 degrees and achieve a CCS value of LESS than 6200 cP in order to be classified as a 0w oil. So, it’s possible that your 0w30 oil which indicates it was tested at -20, may actually have been tested at the required -35, but the PDS was typed up incorrectly.
Either way, even if the second oil was tested at -35, if the 5621 cP number is correct, then, the first oil is still better in cold temps.
Of course, that doesn’t say anything about it’s performance in hot temps or other stressful conditions – just cold temps.
Hope that helps.
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LikeDislikeWhat are the requirements for a 0w30 oil if it is tested using the ASTM D2983 method? I was looking at the same company and one spec sheet was from 07 and the other 2011 and the one from 07 ccs was the 3808 @ -35 and on the 2011 sheet it said 5621 at -20….however on the 07 sheet the viscosity cP was tested at -40 (D2983) at 16,260 and on the 2011 sheet it says “viscosity cP @ -20 is 5621 but it has the (D5293) method listed…..maybe they meant to show it under the (D2983) method and typed it up wrong.
Was this answer helpful?
LikeDislikeThe D2983 test is not a CCS test, and they are not comparable. In fact, it’s generally not even used for motor oils, but moreso ATF and such. So, the two tests are not comparable at all.
If I were you, I’d contact the company directly to verify the numbers and/or to let them know of the error.
Was this answer helpful?
LikeDislike