I purchased M Graham Walnut oil in the past and discovered it took forever for my painting to dry. A few months later when I went to varnish it - the paint smeared! So I bought the M Graham Walnut Alkyd OIl and it works great! It dries fast and leaves a glossy shine - it doesn’t get dull when it dries. I varnish anyway so it isn’t a plus for me. But, your values will be correct for each session - no need for retouch varnish in between each session to bring back the correct values. However, I tend to not use the medium with every paint stroke so I WILL have dull areas. Long story short… I like it for the drying!