SOMEONE IN THE KNOW PLEASE TEST YOUR PERFECT MIX WITH A VISCOSITY CUP!! Why are we all banging our heads on the mix issue? I've seen 50/50 down to 10%. C'mon, someone be a hero and help us out! This method would take into account everyone's local temps.
http://www.amazon.com/Wagner-0153165-VISCOSITY-CUP/dp/B00069P9KG