Every 3000miles on the 650 daily ride , never rebuilt, high miler(40k is high at my house) .
The 500's and 550's haven't gotten many miles on them since rebuilds so they get an oil change first thing each season. Sometimes the oil that comes out the pan looks cleaner than the new oil that I'm replacing it with. Seems like there's more life left to it,i'd like to reuse it somewhere..
Reminds me of that Good news/bad news joke..
The Warden says to the inmates, 'Men , I got some good news and some bad news.
Here's the good news. All ya all are getting new underware.
Now the bad news, You change with you and you change with you and....
I can't put it in another machine, but, seems a shame to waste it.