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Winterizing: Prestone vs RV antifreeze

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  • Winterizing: Prestone vs RV antifreeze

    I've read various posts about using RV antifreeze to winterize the engine but I also read it doesn't contain corrosion inhibitors. Wouldn't it be better to use automotive antifreeze then drain and flush in the spring?
    1987 Doral Classic 200 Bowrider, 4.3 Mercruiser/Alpha One, 1970 Evinrude 9.5hp Sportwin, 1965 Johnson 5hp, 1964 Evinrude Speedifour, 1963 Evinrude Starflite and 1960 Evinrude Lark and when all else fails, Upper Canada Paddle Company paddles

  • #2
    Re: Winterizing: Prestone vs RV antifreeze

    If your boat is stored near a body of water, non-toxic is the legal one to use.
    Anywhere else regular is fine.,but don`t just flush it out in the spring, drain it and save it for next winter.Dosent go bad.
    NO PERSONAL QUESTIONS, THIS IS WHAT THE FORUM IS FOR.

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    • #3
      Re: Winterizing: Prestone vs RV antifreeze

      i've litterally winterized 1000's of engines with RV antifreeze. Works fine. Plus you can bring it to the lake and not worry about killing fishies or start it in your driveway and not worry about killing the neighbors dog.
      just because you found it that way does not mean it is supposed to be that way.

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      • #4
        Re: Winterizing: Prestone vs RV antifreeze

        I use prestone, then drain it back into a clean container for use the next year. And as we never get below the high teens I only use a 25% mixture.
        For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. They will turn their ears away from the truth and turn aside to myths.-2 Timothy 4:3-4:

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        • #5
          Re: Winterizing: Prestone vs RV antifreeze

          cheapest is best, LOL. Used automotive but this year tempted to switch to RV/plumbing. This is a throw away stuff anyway. What good is Prestone if half the year your boat eats lake water. Is Prestone going to restore the engine?

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          • #6
            Re: Winterizing: Prestone vs RV antifreeze

            cheapest is best,
            Ayuh,... I Agree,.. That's why I store all mine Dry..... Air don't Freeze...

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            • #7
              Re: Winterizing: Prestone vs RV antifreeze

              I purchased 2 gal of Ban Frost 2000, a few years ago, and keep reusing as stated above. It does have a rust prevenative package.

              http://www.camco.net/Menu.cfm?SupCat...ProductId=2280


              But, as Bondo states, drained correctly, air works fine.

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              • #8
                Re: Winterizing: Prestone vs RV antifreeze

                For my raw water cooled stuff I use the gas/vapor mix described by Bond-o. It flows into the block and manifolds easily and automatically (in fact you would have to really work at keeping it out). It has a pretty specific formula, but even so it is cheap (free) and readily available everywhere.

                The trick in winterizing a raw water cooled engine and manifolds is to drain ALL water first, poking wire thu the drain holes, a lot of water should come out. And then realize it will not corrode much just sitting there with air in it, so skip the antifreeze and bypass any heartburn over the environment (pun intended). As proxy mentioned, nothing will actually help restore the block.
                2002 Bryant 188 4.3MPI

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                • #9
                  Re: Winterizing: Prestone vs RV antifreeze

                  I have a Volvo 5.0L V8 with the SX leg and when I am done with mine for the summer I just drain it to prevent freeze damage. I installed 4 ball valves on my block and manifolds so now it is very simple to drain the block, just turn the 4 handles a 1/4 turn and it drains. I also pull the hoses off the raw water pump to let that drain but that is it. Battery comes inside and covers go on it for the winter. In the spring I do a full tune up and service. Course I have Fuel Injection so I just add some stabil on my last trip out.
                  There is no replacement for displacement

                  2006 Chaparral 204SSi
                  VP 5.0L GXi-F with SX Drive

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                  • #10
                    Re: Winterizing: Prestone vs RV antifreeze

                    Just watch the build up behind those valves. Nothing works as good as removing a plug at the block or manifold and rodding it out. I'm just sayin'...
                    2002 Bryant 188 4.3MPI

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                    • #11
                      Re: Winterizing: Prestone vs RV antifreeze

                      it amazing how much more water comes out when you put the shop vac to the drain hole.
                      rob
                      home is where we drop anchor

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                      • #12
                        Re: Winterizing: Prestone vs RV antifreeze

                        I always drain mine first, but I run a bit of RV antifreeze through just to take care of any small amounts of water laying in places I can't completely drain. For me, its cheap peace of mind. We used the same process when I worked at the marina, and I never replaced an engine we winterized. I did replace several that people though they did properly, but never one that was totally drained dry and left that way, and never one that was drained and filled with RV antifreeze.

                        I don't use the green stuff though. Our boat is winter stored very near the water. So close in fact, a large part of the yard floods at a high tide, and most of it floods at a moon high tide.
                        1993 Rinker FiestaVee 300
                        twin 5.7L/Bravo
                        newly appointed with Bravo III lower units

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                        • #13
                          Re: Winterizing: Prestone vs RV antifreeze

                          I installed 4 ball valves on my block and manifolds so now it is very simple to drain the block, just turn the 4 handles a 1/4 turn and it drains.
                          Ayuh,.... As noted by Maclin,.... That could lead to a very Nasty Surprise some Spring,....
                          You've Gotta be able to rod/ dig the Crap,+ Crud out of the block....
                          The drains are at the Bottom of the water cavities,+ That's where the Crap settles......

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                          • #14
                            Re: Winterizing: Prestone vs RV antifreeze

                            Originally posted by Bond-o View Post
                            Ayuh,.... As noted by Maclin,.... That could lead to a very Nasty Surprise some Spring,....
                            You've Gotta be able to rod/ dig the Crap,+ Crud out of the block....
                            The drains are at the Bottom of the water cavities,+ That's where the Crap settles......
                            .... and blocks the water's exit! Anyone else 'been there, done that'?
                            Do I hear an AMEN!
                            For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. They will turn their ears away from the truth and turn aside to myths.-2 Timothy 4:3-4:

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                            • #15
                              Sign up today
                              Re: Winterizing: Prestone vs RV antifreeze

                              So basicly what all of you are saying is that there is more than one way to skin a cat....

                              But then it begs the question...Who wants to skin a cat anyway???
                              2011 Triton 190 Escape SE 150 Mercury Pro XS

                              I never learned much from winning, but always learn from failure.
                              Semper Fi

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