Use good oil Like some said its all over the place. I use Mobil 1 in the engine, Bel ray trans, Hd primary oil be doing it for 200000 miles on all my bikes. Just use good oil ,ie name brands.

 

Use good quality motorcycle oil that's designed for a big air-cooled V-twin. You're going to be changing it in 5,000 miles anyway. Don't use automotive oil that's designed for a thermostatically-controlled range of temperatures, you want oil made to handle the environment a giant air-cooled twin experiences. Every good manufacturer makes V-twin oil.

I've had dealers put in Harley Syn3 when I've had services done by the dealer (when I had a prepaid service agreement). When I had my 40,000 service done, it was done at an indy shop. Know what oil he used? Neither do I. I assume it was Amsoil because I just looked on their webpage and they do mention Amsoil, but the bike runs perfect and as long as it's a good quality oil it really won't make much of a difference.

 

I miss the oil forum, it was a great dumping ground for this kind of stuff.

 

Until someone can show me irrefutable evidence that their engine failed simply due to the use of "X" brand of oil I will say, "use whatever brand of oil meets OEM specifications".

I changed the oil in my Heritage last week, and I used Amsoil. Why? Because the previous owner gave me some. I'll be sure to check back in if my engine explodes.

 

I switched to Syn3 some time ago, I get fewer colds and last longer in bed.

 

I'll look into that. I run Amsoil products in all 3 holes and dropped my bike last month.

 

🤣🤣

 

You were in the old oil forum, went through ALL of the old posts there, and did not see ANY posts about using Amsoil?

Okay.

 

Amsoil all 3 holes always have and wouldn’t consider anything else , it’s your bike and money

 

AMSOIL. I run it in everything. all three holes of my bike. Engine, trans, power steering, differentials, eng coolant, transfer case, and transmission in my truck. Never had a fluid related failure. But, I also ran about every fluid on the shelf at O'Riley's at work for my last job in the farm vehicles and also never had a fluid related failure. The most important thing is that you just have the proper fluid for the job.