I must be as crazy as the OP. All three holes @ 3k miles.

 

Changed oil in 2013 and will probably change again in 2015......

 

LOL - That's quite a plan! Never measured maintenance in years..

 

Yeap, we get dirty anyway, so why not do all three.

 

Using a top tier synthetic, I change all three once a year in the spring.

 

As I usually put 6-8 K a yr on here I do

eng and pri -- around 5k and again at summers end...

tranny -- at the end of summer

switched to mobil 1 V-twin 20-50 4yrs ago in all three and totally happy...

 

All 3 holes before I park it for winter. This summer I had 1,202 miles on it. If I hit 1500 miles during riding season I change engine and primary. Then no mater what, 3 in all holes again before the next winter. I do the complete oil change too.

 

When I was 18. After 48 years now, I know it hardly matters. You could go 10K easily and 20 on the filter. However, I am like you and do all three holes. I personally think the transmission and primary get beat up more then the engine. Trouble is, little of the metal comes out. So really does not matter there either.

 

why I use tranny gear oil and not motor oil too. Huge difference. Amsoil 75/90.

 

I change all 3 every 10,000km (6,200 miles)
- Engine: 100% synthetic 20W50
- Tranny and primary: 100% synthetic 75W140