RV Antifreeze

[harleyguy]

I winterized my Coachmen Freedom Express last October (2019) with -75 degree Splash antifreeze. I won't be using the RV at all this year. Will the antifreeze that is in the lines currently be okay or should I re winterize with new
antifreeze. I live in Michigan so the winters get below freezing

[Oaklevel]

If it was alcohol based I would rewinterize. 10 minutes and 2 gallons of antifreeze is worth the peace of mind.

Our dealer recommends not using an open bottle of alcohol based antifreeze in the lines due to moisture contamination. In the tanks is ok.

If it is not alcohol based should be ok.

[Chris Pastuzyn]

I don't think you have to do anything more to it,You should be fine.Im sure the very helpful people here will chime in.

[5picker]

Dow Chemicals MSDS says good for two years.
I'd look up the MSDS for your specific brand but I'd have zero issues leaving in what's there.