20k in a transmission is way way to long. i dont care if its a sealed unit. Gears grind and mesh and wear. I dont care what the manual says and 10k on a clutch pack is ridiculous. Clutch plates wear big time and contaminants are washed into the oil.

 

5K changes all 3 on my 'King.
Mobil 1 20w50 V-Twin Syn all the way, K/N 171-C.
To each their own.

 

I totally agree with you. I may be a newer member on here and i get a lot of smack on here from people because of that I think, but I'm a wrench head and a plant mechanic by trade for a world renowned company. I know what I'm talking about. Oil breaks down big time in heat and I think some people forget Harleys are air cooled.

 

Spot on...

 

And yet the notoriously cheap Mothership offers a 2-year, unlimited-mileage warranty using those service intervals with non-synthetic fluids.

Though truth be told, I can't sleep if I don't change the primary fluid every 5k and the transmission every 10k. I should probably send the next batch out for testing to ease my mind, 'cause that proved beyond a shadow of a doubt that the oil is fine for 5k.

 

No matter what you think, someone here will disagree with it....I ignore them.

Because really....Who cares? It's just idiots on the internet!

 

And it's not even Winter...

lp

 

Also how you ride makes a difference. Of course all highway miles are easier on the oil. I do a mix of bar hoping and the longer loaded down rides. I ride hard and I spend time maintaining my machines even harder.

 

hahahahaha...crissake how funny, yet true! These are only opinions...I retain those I think useful and discard the rest...I never take offense.

 

Some change oil every 1000-3000 miles, some change every 5000-10000 miles. If you got 20000 miles on you bike and over 4 oil changes, you wasting money. The injected engines are better precised designed and can tolerate more heat and abuse. If you're getting a lot of metal and shaving when you change oil, changing oil will not stop the wear. You got an ongoing problem......