They are absolutely oil paints. I was an art major in college, so I'm completely familiar with artist paints. These are a new type of paints I suppose, because they didn't exist when I was in school.
It says on the tube, Water mixable oil colour. It further says, vehicle: modified linseed oil. Genuine oil colour which thins with water and cleans with soap and water. No hazardous solvents required. I wonder if the required part means not necessary, but a solvent would work if I used one. It doesn't say I shouldn't use turps, just that I don't have to. Go to your local art supply store and check them out.
I might have to do some experimentation to find out how compatible they are with enamels. I've used the black for a wash some, and they did thin nicely with water, but didn't start getting plastic-ey and drying out quickly like an acrylic does. It took a good while to start drying.
Madda
Trifles make perfection, but perfection is no trifle. -- Leonardo Da Vinci
Tact is for those who lack the wit for sarcasm.--maddafinga