Sell that Oil
When Wesson oil was working to make inroads into the shortening market they developed this cake which was co marketed with Softasilk cake flour. The cakes were as instant hit because of the heavenly heights to which they aspired, weren't as precise as an Angel Food, didn't leave you with left over yolks and can be flavored with just about anything. I also love sponge cakes for the etherial mouth feel and because the cakes can hold up to cup of liquid after baked to infuse liquor, citrus and increase moistness. When ever I make a Black Forest Cake which was originally a Genoise, I use the chocolate sponge cake recipe baking it three 9 inch layer pans and invert them after baking. Sponge cakes both baked and steamed are extremely popular with the Asian culture that has been making them for hundreds of years without oil. The cross over is close enough that they are well recived at family events with my inlaws.
Cakes baked with oil tends to attract moisture after baking like carrot cake and other fast and easy one pan cakes using oil instead of shortening.