So I know there's a lot of love for the Mystik JT-6 High Temp Grease for an GC-LB application. I couldn't help but notice it's only rated down to -10F. Here in Canada it gets down to -40F. Is it not a good idea to use this grease in such an application? I know Mystik has a low temp grease but it looks thick and appears to be calcium based.