So, I was adding a quart of oil to my wife's truck last night when I decided to do a rudimentary experiment. I had a quart of 15w50 Mobil 1 and a quart of 30w Havoline sitting there. The temps here have been about as cold as they get in winter. It's been in the teens at night and hasn't risen above 32 during the day for the last 3 days. Well, it was 25 out when I did my pour test. The thing we do sometimes. Long story short, I shook the bottles and the 30w seemed a little more fluid so I took the empty quart bottle I just poured out, stuck a funnel in and pout the 15w50 first. Well it would take 10 seconds for the funnel to drain when filled to the top. Thick stuff, small funnel. Then on to the 30w. All things being equal here, it only took 8 seconds for it to drain the same funnel. Now this brings me to my question.
Are 30w oils, or any single weight oils, oils that just don't make the cold, i.e. 10w, pour points? Like say a 15w30 or a 20w30?
I plugged the numbers in the chart that has been floating around here that uses the 40c and 100c temps and it showed the 30w doing way better than even 10w40. I don't know. Maybe just too bored in the cold. Still surprised that a 30w dino would outflow a 15w50 group 4 syn by 20%.
Rhett
Are 30w oils, or any single weight oils, oils that just don't make the cold, i.e. 10w, pour points? Like say a 15w30 or a 20w30?
I plugged the numbers in the chart that has been floating around here that uses the 40c and 100c temps and it showed the 30w doing way better than even 10w40. I don't know. Maybe just too bored in the cold. Still surprised that a 30w dino would outflow a 15w50 group 4 syn by 20%.
Rhett
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