Quote:
Originally Posted by aerohead
I took baby-food container samples of a half-dozen motor oils,from Honda's 0 wt-20,to 5wt-30,10wt-30,10-40,etc.,and placed them overnight in my freezer ,at 0-degrees F.
Next morning I pulled them all and did a 'tip'-test,turning all of them over simultaneously.
All of them essentially poured out within the jars at an equal rate.
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Sorry, but dumping them out against zero resistance using uncontrolled pressure is a rather unscientific test. There are reasons why oil viscosities are measured using designated test procedures (ASTM D5293 and ASTM D4684).
Also, it's "W," not "WT" as oil isn't measured by "weight," but viscosity. The "W" denotes the cold-weather ("winter") viscosity. Otherwise, there would be a W after both numbers (i.e. 5W-30W) or the W would be at the end to denote a viscosity range.