Just wondering if anyone has tried to use any type of marvel mystery oil, or any kind of additive to help burning oil in the XR600. This is the situation. I have an '89 XR which absolutely needs a new top end and seals. It burns so much oil that after 10 miles of riding, the rear fender is dripping with oil. It leaves a trail of blue smoke down the street at any and all speeds. I just finished putting the bike together, and I knew it burned oil when I bought it and was planning on rebuilding the motor, but I thought I could get at least one ride out of it. But I didn't realize it was this bad. Anyway, I am leaving for a desert trip next weekend, and there is no way with the holidays that I can order the parts I need and get them in time. So would anyone even consider putting any type of additive in their motor for one weekend, knowing that the motor will be completely taken apart and rebuilt after this one weekend? I just don't know if adding an additive would cause more damage to the motor or clutch. If adding an additive is highly not recommended as a very temporary fix, then I would probably just keep a quart or 2 of oil with me and check the oil level every 50 miles or so. It actually dropped a tiny bit on the dip stick after 20 miles. (haha). Thanks for any input. All I really need to know is if anyone has tried an additive and if there are any problems associated with doing this as a temprorary fix. Thanks.