Believe me DOT 5 is not the answer to everything, and not a answer at all sometimes.
I am a tech trainer for Yale, and Toyota forklifts, and have been a forklift tech for them since 78. Yale came out with a new model lift right after DOT 5 came out. They mounted the brake assy on the top of vertically mounted dual drive motors horizontally. These were used in and out of coolers, in and out of the cold. Kind of like a truck kept in a unheated garage. The brake assy started going bad in less than a year, and ALL of them in the same way. We opened them up and found a ring of pitting around the cylinder housing.
What we found out is that condensation was collecting in the brake cylinders, and since DOT 5 does not absorb the water, it was floating on the top of the brake fluid, making a ring of rust and pitting. Their answer was to make the cylinders out of Stainless steel. We replaced about 50 cylinders (2 per truck) just in the Memphis TN area.
And I know that some people will never have any problems, I'm just letting you know about a large scale problem that happened, and cost a major company a TON of money.