I'm TELLIN ya. This is the SIMPLE answer, although it may prove difficult to fix.
ADDITIONAL PRODUCTS I don't care the brand, type, or purpose, are NOT going to have a significant effect on cooling.
i agree but here is a formula from an old S. Dulcich post that may work.
1. Collect as many snakes as possible..black,garden,green...no matter
2. Boil in a large pot until contents are rendered to a thin oil
3. Add to radiator