I posted this at the other boating NG and it was never answered (the first
post to the thread was a flame....go figure). :-)

So I will give this NG a go.

In the past when I had twin drives I had the marina complete all my
winterizing, including engine. I now have a single drive and am giving it
a go myself this
year, including the lower IO unit and engine.

A question:

Is regular automotive type antifreeze (e.g. Prestone) better for the engine
than the colored stuff sold at boat and RV stores (such as
http://tinyurl.com/cpfbn ).

I realize that the automotive type is not environmentally friendly and if
used I would address that issue when starting up the engine in Spring.

TIA for your help. ;-)