I am about to change my coolant. 30bucks @ the shoop. I wanna do it bymyself.

http://www.ehow.com/how_1861_change-radiator-fluid.html

any advices yall?
50/50 mixture? can i go 100% coolant? will it be better?
thank you!

 

mix 50/50 or else it wont work up to the recommended colling temperature, but that guide explains it step by step perfectly. if you are gonna do some cooling system cleaner i would recommend BG products because they are the best out there for chemicals that clean