I'm New here and a first time bike owner, and I want to say great site and info. Now my bike when I got it had normal HD dino in it after reading here I went on a full syn oil hunt and the only thing I could find was Spectro 20/50 Plat after driving 42 miles LOL. All I can say is WOW the diff in the bike is night and day. Next oil change for the trans and primary is going to be spectro too, got redline in the trans and formula+ in the primary for now. But for those wondering about spectro engine oil I highly recommend it. Again thanks to everyone who post and helps on this forum I have learned alot.