first start break in

Anti-freeze, by itself, is a lousy coolant. Almost every overheat Ive ever encountered could be solved, or at least alleviated, by straight water. The reasons we use it are, for freeze protection. The additive package can be purchased separately .
-I run straight water all summer, with the additive pkg. I run a 7 pound cap, and a 205* stat. Has worked flawlessly for 15 years and 125,000miles.Little 366/430 hp, no A/C.Impossible to overheat. 50/50 goes in in the fall, out in the spring.