I'm south of I-80, and I've used nothing but the -20 degree blue stuff (from either W*M or Menards) for several years now.
Two things:
1) I use the -20 stuff year around.
2) I always keep it tightly capped.
No problems here with the blue. I used to buy the -35 purple stuff, but that was years back.
Is is possible that you're still seeing residual effects of the +32 stuff?
Two things:
1) I use the -20 stuff year around.
2) I always keep it tightly capped.
No problems here with the blue. I used to buy the -35 purple stuff, but that was years back.
Is is possible that you're still seeing residual effects of the +32 stuff?