I find it interesting that the pour point of QSUD 10W30 is -51 degC, while the 0W20 is only -45 degC. I would have thought the 0W20 would have a much lower pour point than the 10W30.
10W30 datasheet
http://www.quakerstate.com/en_us/product..._Motor_Oil_.pdf
0W20 datasheet
http://www.quakerstate.com/en_us/product...c_Motor_Oil.pdf
10W30 datasheet
http://www.quakerstate.com/en_us/product..._Motor_Oil_.pdf
0W20 datasheet
http://www.quakerstate.com/en_us/product...c_Motor_Oil.pdf