Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums General Petroliana Discussion Amoco LDO Quart

The Marathon quart has a date of 8-82 so I believe that would be around the time frame the round quarts were used.
I have always thought the quick switch to the rectangle plastic was to conserve space.
As I remember a case of round plastic quarts came in a single layer case of 12 where as the rectangle plastic came in a 2 layer of 6 on 6.

Dave