2004 GL1800 Bloodstone Red Metallic
1988 GL1500/6 Martini Beige Metallic (Sold)
1984 GL1200 Pearl Saturn Red/Century Brown Metallic (Sold)
1981 Honda CM400T Candy Sword Blue with Metallic Light Blue (Cubed and Recycled)
The car oil setup is different than a bike configuration. On a car the transmission is separate and has its own fluid. 10k on synthetic is nothing for a car. On a bike, the engine oil is also used for the wet clutch and transmission. More of a chance of getting clutch fibers and gear chips on a bike, as a result I do not go more than 4000 miles on any type of oil, don't want all that "stuff" getting into my valvetrain, which will be much more costly than an oil change.
It would be nice if the wing had a setup like the Honda CRF250/450Rs do where there is separate oil systems, one for the engine/valvetrain and one for the transmission.
Way way back in the 90ty's Motorcycle consumer news done a study on oil where the put fresh oil in then tested every 250 or may have been 500 miles, what they found was at around 1500 miles in bike where the engine oil also lubed the tranny all the good stuff was pretty well done in, at the time Mobile 1 preformed the best.
So I change mine between 4000, 5000 miles just because I can't bring myself to go any longer. Way cheaper then wrecking an engine.
I run regular 20-50 Castro GTX motor oil. I change it out every 3000 to 3500 miles. I have done this on my Harley for years and I plan on doing it on the Wing also. The wing just went over the 3000 mile mark and as soon as it stops raining around here I'll get right on it.
When I was using the Honda oil I change every 8000 miles as per the manual. Now that I'm using Amsoil it says 15,000 mile intervals. That's what I'm going to do. If I'm wrong and this screws the engine/transmission up, it will give me a good reason to buy a newer wing. Win-win for me.