Keyser Manufacturing’s 40 Below coolant additive is designed to reduce temperatures by up to 40 degrees F.
The additive maintains coolant temperature between 180-210 degrees F when (1) 32 oz. can is added to a full system (mixture of 80 percent distilled water/20 percent ethylene glycol).
40 below can be used with anti-freeze, but for best results use without
Under no circumstances should you ever use or mix with Dexcool
40 Below works wonders in your street rod, RV, racecar, marine or anything with a high performance motor