They say Citgo Oil makes syn3. Bad choice for Harley, new brand for me.

 

If you dig far enough I think you'll find that its Chevron that makes Syn3 and not Citgo.
In any case do what I do and use Mobil 1 for V-Twins 20/50W in the engine and tranny and Mobil 1 75/90W in the tranny. You can also use Amsoil,Royal Purple, or a number of other full syntheticsbut "IN MY PERSONAL OPINION" they don't do enough more for you to justify the extra cost. Besides the Mobil 1 stuff is relatively easy to find in nearly any Auto Zone for a reasonable price.

 

i use r.p no problems w/it. cars, bikes, lawn equiptment. works just fine for me.

 

There is no bigger support of HD than I.
But when it come to oil and lube sny3 at best is ok and is not the best for your bike.
M1 Vtwin, Redline Spector even Amsoil would be a better choise