Re: which type of antifreeze for storage
Unfortunately most of the antifreeze that is used in winterizing ends up in the water, so laddiesservice has a point. Few people pre-flush before they go out first thing in spring, but even those who do do it in their driveway and the stuff ends up in the storm sewer which isn't treated before it gets to the lake, river, ocean, whatever. Just think about the millions of gallons of antifreeze that ends up there from the millions of boats. Kinda like **** in a pond in proportion, but still not a good thing. Better non-toxic RV than toxic automotive at least. Nothing at all would be better for the environment, but not so good for the motor.<br /><br />Regarding tommay's first item just above...not for use as an antifreeze...for running purposes. It isn't well suited as a permanent antifreeze. But for pickling purposes, just fine.<br /><br />Regarding anticorrosion additives that are absent in RV...I have flushed out motors that were empty all winter and it takes a lot of running before no more rust comes out. With RV it's clear as a whistle before the motor even warms up. But then, rust isn't a pollutant and glycol certainly is. But then again, rust means there's less metal between the water and the oil. Lots of give and take.