I'm new to the forum so please be gentle if this subject has been mentioned. I have an '05 FLHRI with 103 kit, 10.5:1 pistons, Crane Cams. I pretty much beleive in the theory of synthetic engine oil but when I use Screamin Eagle Syn-3 in my Road King I get a lot of engine/valve train noise. I don't hear the noise with standard oil. I would like to use a synthetic, can anyone give me a reccomendation? Thanx in advance for your help.