Well raided Wallmart for their 5 quart jugs of M1 SS 10W-30 for $17.88 yesterday and got home and was comparing the labels of 5w-30 and 10W-30 and I noticed something I hadn't seen before. Both pretty much say the same thing but I was suprised that both say pours at -49 degrees and that the 10W-30 bottle said this... Excellent cleanliness and wear protection in high temperature/ hot running engines even at longer drain intervals!! The 5W-30 label said the same thing but stopped at hot running engines. Is Mobil 1 kinda sorta vaguely saying their oil can go for extended drains again Both were bottles Supersyn. Has anyone else noticed that?