I love this site and learn a lot from it - Vegetable Oils
Go through the list and look for oils described as 'light' as well as the other properties you might want e.g. odourless, anti-oxidant, noncomedogenic (sp?) etc.
My hair is in the 4s, low in porosity, high in density and coarse.

Love: QB - all of it, Bobeam - shampoo bars, Darcy's Botanicals - Pumpkin Seed Conditioner, Coconut Cupuacu Pomade, KBN - Shealoe Leave-in, Oyin - Juices & Berries, Kinky Curly - Knot Today, Ayurvedic treatments, my Denman and the cloud of kinky goodness on my head that I get to play with!