Below you can see detail shots of my two most recent oil paintings. I like the contrast between the first one which is more layers of "dry brush" oil application and the bottom one is very wet oil paint applied with palette knives.
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The above detail illustrates the similarities between oil and pastel. My surface is textured with earlier applications of gesso and first paint layers. Then, I drag oil paint on a brush across this texture. (When I paint with oils, I work on several paintings at a time to ensure a drying of most recent layer.)
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This painting is done all at one time, with lots of wet paint pushed and pulled across the surface with a couple of my favorite palette knives. It might be finished... I will let it totally dry before deciding. I may glaze over it. (On a side note, I love the way this looks like the surface of moving water... inspired by many hours of river studies!)