"if I was going to put in anti
"if I was going to put in antifreeze, I would use the Low Tox propylene glycol automotive stuff It's the same as the plumbing stuff but with rust inhibitors in it.
Don't use regular auto ethylene glycol, it's one of the deadliest poisons around and getting it in the lake is really bad.
Even the Low Tox stuff should not be released into the lake, but I would sleep nights if it happenned by accident, whereas with ethylene glycol, I would not feel very good.
I just drain my boat's engines and poke wires up the drain holes to make sure I get all the water out. Haven't lost one yet.
As Bondo says: "air doesn't freeze""