Don't know why,but i got a wild hair to change from harley oil to something different.Out of the blue i decided to try lucas regular oil in the engine,lucas gear oil in the primary,and belray in the tranny.WOW,WOW.This bike has never been this smooth,quiet,and shifted better.So impressed,i had to share.This is a 09 road king,20k miles.

 

I use Mobil 1 VTwin or Harley in the crankcase with 1 quart of lucas oil additive, I use Red line in the trans and Mobil 1 4T in the primary.

Lucas oil is good stuff too

 

You will really notice a diff when you get away from the MoCo fluids regardless what you use.....

 

I have been using the Belrey in the tranny and lucas stabiliser and seem to not have a lot of the problems that a lot of guys seem to have..Maybe just lucky..

 

Used Lucas in the crankcase for years. No issues