I recently bought my 2001 XR650L. Approx 4,900 mostly street miles. The oil had just been changed before I got it so I have been riding it when I can. For peace of mind I want to do a few things including change the oil. The Honda dealer recommends a synthetic blend instead of full synthetic. Which oil do you guys recommend and why? How often do you change the oil? Which oil filters are best? Thanks for the advice. I tried the search feature but I just kept getting the searching icon in the upper corner.