That -21 was my fault. I travelled south for a bit and brought it with me.I live in Kentucky so i get the best of both worlds lol. I do like i would for my car and run more viscous 70/30 in the high 90s and low 100s we get in summer, then i run 50/50 in wintertime. It got down to -21 about 2 winters ago. I never use the little insert in the reo tube since i dont have probs w autosquonkin
