use amsoil with it's filter with 8000 miles plus. Had the oil analyzed and it was still good to go in my Ultra. 2000 miles with any syn is way too often no matter what oil is used. no matter what, change before cold weather if you live in most parts of the country.

 

Every 5K is fine with Synthetic .. If makes you breathe easier changing it sooner by all means do so ..

 

Castroil MC 20w50 every 2500 miles like clock work. Have about 13000 miles on my 06 1200 Custom. Regardlees of what bran of oil you use," YOU CAN NEVER CHANGE YOUR OIL TOOOO MUCH."

 

I've been running syn in my sled for 3,500 miles; it's been a tad over 2 years. I was thinking about changing it @ 5K, but at this rate it maybe 3 years till I hit 5K. Does time have an effect on oil? I've been going by miles. When i check the oil, it looks clean. Wow! the first year i got my sled - i put almost 15K on it.

any thoughts?

 

Generally yes, I would change my oil once a year even if the miles were well below what is recommended.
Even Amsoil, who generally recommend going twice the manufacturers interval on motorcycles, still recommends at least once a year.

 

For rule of thumb I use 5 K or 6 months for a change, but only once on the Sportster did I reach 6 months before 5K that was last winter when FL was unusually cold and didn't ride it as much when had the bagger to choose from as well .. Should be able to go a year though with good synthetic..

 

I change mine (syn 3) every 2500 miles . Sent the oil in for an analysis (38000 on bike now have over 45000 )the report came back that the engine showed less than average wear . They also said the oil still had life and their recommendation was to change the oil every 3500 miles.