I am often asked whether I use oils or acrylics. The answer is both (that's why I always write "Acrylic and Oil Paintings by Lena Karpinsky". I also use various mediums and additives to achieve the deep texture, to blend colors and so on...
Please do not ask me about specific brands of acrylic or oil paint. I use everything they sell in the art stores. Each type and each brand has pros and cons - for a specific use.