Safflower oil. But PUFAs are prone to rancidity. Be sure to get a good, fresh one. And store in fridge. I buy Napa Valley Organics at Whole foods. Put a small amount in a dark bottle for daily use and put the rest in the fridge. Apply a few drops to wet skin or with we fingers to make it easier to apply lightly.
Because of their bulky conformation, unsaturated fatty acids also reduce the skins barrier integrity, which leads to abnormal keratinization and clogging of pores, too.9 Saturated and trans fats are weak PPAR activators, not substrates for LOX or COX, and very long chain saturated fatty acids (with cholesterol) enhance the skins barrier function. Medium chain saturated fats, such as lauric acid, can worsen acne in some people by activating toll like receptors (TLR) in the skin. Sebum from pre-pubertal children contain more omega-9 fatty acids and less omega-6 fatty acids compared to sebum from adolescents when acne begins to appear."
There are lots of oils that are high in linoleic acid. IMO it's a good idea to experiment with a few and see what your skin likes. Several high linoleic acid oils like safflower, sunflower, and grapeseed break me out. The only on that works for me is watermelon seed oil.