I run far less than 50/50 because I live in the desert and do not do snow.
One has to remember that water dispels heat better than coolant. I use a mixture of coolant and distilled water in both cars. Never have a heating problem even in 115F temps.
Anziani
'93 300CE 199K
'95 E420 122K

ANZIANI is correct. The best coolant is straight water. And, the best cooling system corroder is straight water.
Prestone, Peak, etc. aren't coolants. That's a misnomer. Yes, they will transfer heat, but not as efficiently as straight water. They’re anti freeze with good corrosion inhibitors.
In hot climates it’s the only reason for even using them.