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Message: <blockquote data-quote="TomT" data-source="post: 570217" data-attributes="member: 55397">I have always used 10-30 in my Trac but I live down here in the South. You gotta remember the manual is pretty generic and does not take into account where you live. Sometimes you have to think out of the box.  Now for vk up in Canada, I would stick with the 5-30. I agree about using synthetic during break-in is okay. The only real difference between synthetic and a good dyno is the synthetic will not break down as fast. That being said, I do believe in changing the oil at earlier intervals the first couple of changes until the motor gets broken in. Would be pretty dumb to spend the extra money for synthetic if your going to change it in 3000 or less.</blockquote>