As an owner of a motorhome you should know how to winterize it properly. Just use your owner’s manual and use common sense. If you are asking if you need to fill the 3 tanks with pink RV antifreeze you are not using common sense. If you don’t know how to winterize, please take your unit to an RV dealer and have them show you how to do it. Then the next important thing is make sure they show how to un-winterize it next spring.
I had a friend that had a RV dealer winterize his motorhome and did not watch the procedure used. In the spring not knowing how to un-winterize it, he just started by filling his fresh water tank. He ended up flooding the whole interior with water.
