Posted by pete 23 on November 11, 2020 at 11:58:14 from (50.33.20.24):
In Reply to: Motor oil weight posted by Abane on November 11, 2020 at 07:18:51:
A 15 wt oil is pretty darn thick in zero weather. Also, oil wt's have a pretty large range they can fall in for a min and max viscosity readings. . Your multi grade oils will usually fall in the higher end (thicker) on the low number and on the lower end (thinner) on the high number. Meaning measuring how long it takes for a specific amount of oil to pass through an specific sized orifice at a given temp.
Put a jug of 15 40 in the deep freeze along side a 10 wt oil and see which one you can pour out of the spout. Might be fine, might not .
Also, back in 1954 I used Skelly Supreme number 1 which was a (believe it or not) 10w-30 in my 37' Ford car. Went to Skelly Supreme number 0 in winter. Multi grade oil has been around a long, long time. Improved, changed of course, but it has been here.
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