Being new to riding and owning an "older" class of bike, what would be the best suggestion some of you could give me for my engine oil. I am not mechanically inclined as a lot of you are here but I can change my own oil, just not sure what to use. I have a 94 Sportster with 22k miles on it. I have the HD chrome oil filter to put on it but no oil as of yet. I see a lot of guys saying they use Mobil 1 Full Syn. Please any suggestions will help. My manual calls for the HD oil 20w50