Yes, camfollower falt surface area that rides along the camshaft lobe is made of equal material to lobe. The flat surface provides slickness when riding along lobe. Oil helps to lubricate the two metals (the follower and camshaftlobe) during the cam revolution process, also helps to cut down on metal to metal contact and friction...... You do NOT want the follower to be running against the lobe raw (metal to metal) this would cause extreme wear and possibly metal shavings in your top end lol. Yes, the valve train already has some oil flowing throughout, BUT it is still important to put fresh oil on the follower when replacing back into motor, or simply putting the old one back in as well.