What's the best oil to use in HD bikes? Is it synthetic?

 

Yup. Syn for sure in the motor and trans.

 

Not trying to be a smartass, but the sticky above has 44 pages of response to the question, "what oil do you use in your bike?" There's a ton of info on that thread and other threads about pros and cons of various oils. Try the search function and you can read all day.

 

Ok, you have 7 posts and he has 2....which means you have 2.5 times as much experience on here. cut the guy some slack.

 

+1

 

I'll use search function next time before asking questions. I'm sorry for being new here.

 

I used H-D dino for many years, the weight specified for the motor and recently put in H-D Synthetic 3, Screaming Eagle. Seems to work OK.

 

Welcome to the site...If you change your oil every 2500 miles don't waste your money on Syn....iF YOU GO 5000-7000 then syn might be better...depends how hard you ride too...I went with syn in the crank and primary and inthe tranny but at 20k miles i changed the tranny to severe gear??? can't say i felt any difference..i will use a 75w140 next time and regular primary fluid. Mobile 1 15w50 car oil at walmart for $22 a 5qt container is a pretty good deal. You will get a lot of opinion...read throught the search response and make your own mind up...it's really not that complicated...Like i told somebody else...look at your owners manual.