RE: Is this product safe on engines?Is this brand any good?
Your alcohol is flammable and burns without a flame. Don't use it around your stove, water heater, or furnace or anywhere there's a spark or open flame.
I never use alcohol or gasoline as a solvent. There are too many good cleaners. My preference is Stoddard Solvent.
Just my 2ยข worth,
Dave Olson