Originally Posted By: Vikas
I do NOT consider 45-75 temperatures to be "wild swing"! Does oil needs to be saved in climate controlled chamber? Being in attic, it might be more extreme but in basement? No; basement actually stays more moderate than the above grade. - Vikas
Well the reason I consider the 45-75F basement temp. range in the winter to be wild swings, is not so much the range (only 30 degrees F), but how quickly the temperatures cycle through that temp. range. The basement heats up pretty quickly (under an hour) and cools quickly. This heating/cooling cycle is repeated, sometimes a couple times a day throughout the winter.
The jug that was garaged saw a much more extreme swing (we had temps from about -15 to 97F, while it was stored), but temps changed gradually, throughout the seasons.
But this doesn't explain how the older PP jugs and the newer Quaker State Ultimate Durability jug made it through OK in the same storage tub. Also, (don't tell Mrs. OilNerd
) I had a few other jugs not stored in the tub, but in the basement, that also survived OK.