I've noticed a little oil coming out one time. Are you going deep enough? Leaving the needle in for 20-30 seconds after injection without moving it preferably? I would switch to a different site if I were you. The one time I shot my shoulder it bumped up and took a minute for the oil to dissipate. That and I nicked a vein and it bled like hell lol good luck man but for now I would pin elsewhere.