NickL - as Don did previously, I change crankcase and primary chaincase oil every thousand miles. A good riding season for me is 6K.
I have been thinking about going to a 1200 mile oil change interval because I find the crankcase oil is still relatively clean after 1,000 miles.I rarely take rides less than 35 or 40 miles and average would be probably between 60 and 80 miles.
The expense of changing oil and filter at 1,000 miles isn't that great, but I just hate the mess of changing the oil and cleaning up afterwards!
However, I have stumbled onto an oil change method that significantly reduces the mess. Heck! It almost eliminates the mess! Yesterday I did my first oil change using my brand-new Mityvac 7201 Fluid Evacuator Plus and I must say that it works a treat!
This device is designed to evacuate any fluid used on cars, trucks, mc's etc. Oil is supposed to be warm but I used it yesterday at ambient workshop temperature of 70F and it worked just fine. Very easy to use: stick the plastic tube into the oil bottle, give the hand pump 10 strokes, and 17 minutes later the oil tank was empty.
How empty you ask? When I removed the drain at the bottom of the tank not even one drop came out - so the evacuator actually removed more oil than simply draining the tank. And I'm guessing it would have taken about half the time had the oil actually been warm.
Interesting? It gets better. Once the oil was in the evacuator tank I pushed the intake valve to the outlet position, gave 10 strokes on the pump handle, and the device pumped the waste oil out of its reservoir and into a waiting gallon container for transport to recycling. Ten minutes using a larger diameter plastic tube.
To finish things off I I dumped a half-cup of kerosene into the Mytyvac, swished it around, and pumped it back out into another container. No muss, no fuss, didn't even put on plastic gloves. I'd like to say I didn't spill a drop, but in my own clutzy way I let a plastic tube get away from me at one point and it dribbled a couple of teaspoons of oil on the floor.
The Mityvac is very reasonably priced on Amazon.com. With the border closing I had to order through Amazon.ca so naturally I got dinged an extra 40 bucks after taking into consideration tax and exchange, but I'm not looking back!
This device definitely works as advertised and definitely worth the money in my opinion, especially if you have multiple vehicles.