I highly recommend the flax oil. I used a whole bottle of Barleen's and working on my next one. I have tried the olive, apricot, coconut, sesame seed and sunflower.
I want to get some hemp oil but will have to order it in or have to make a trip to the city.
Flax is a stronger flavor, but I've taken some pretty rank herbs and I can take it, especially with the results I've had only oiling in the morning for 20 min. Better sleep is a huge benefit. Also my skin, hair and nails are much better. Nerves are calmer too. Heels are softer...I could go on and on.
Other oils haven't given me the same results...so try it! Everyone is different as you know and you'll end up with your favorite. I also put some oregano oil in with my pull, if I remember.
Oh-I eat 2 Tablespoons of the Flaxseed oil each day. Sometimes twice.