Since the day I bought it...Jan 2001 (its a 2000) its been about 1/2 to 1qt between oil changes depending on how I rode it. I thought I read that was similar to others...I am the second owner. but the previous owner only had it for 2 months and sold it to me to pay Christmas bills? So do to my school and it not being ridden for 3 of the last 5 years. I have probably only put 2000 miles on it and 1000 of it just since May of 2007! So How much oil is expected to burn in these XR650R? Not that it matters too much...a rebuild should fix it since its not leaking. but it never smoked either.