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.


http://i48.photobucket.com/albums/f2...nalUOA-2-1.jpg

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......