well I am saying what everyone else is saying, as long as he is not over weight and can stop, slow go and don't burn up your equipment.
I have a diesel pusher and i don't go up Potisi because that is a steep a$$ grade (both sides) and there is no way I can do 55.. and NO I don't go 55 up Baker grade either, but I set the cruise and let it do its thing.. if I am slow OH WELL! there is a passing lane for that reason!