I haven't tried the cetane booster,and I don't think it gets cold enough here in central GA to need it. But I do use their Diesel Fuel Modifier. An inquiry to Amsoil tech came back that it is neither an emulsifier nor a demulsifier and contains no alcohol and is intended for light duty rigs such as ours. It is intended to add lubricity, stability, etc. to the fuel.
I will say that I have used Amsoil products for about 30 years, and I've yet to find any product that didn't live up to their claims. My trust in them is enough that I purchased a dealership about a year ago when I retired.
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