Just a quick question, does synthetic oil last as long as regular or semi? I put Kawi Chem 10w40 in my zx6rr about 1000 miles ago and its been running rougher at idle but once it warms up it runs like a champ.
synthetic oil lasts longer then semi or regular oil. You can go without changing the oil longer then you can regular oil.
hmmmm. 10w40 should not give you any trouble. I dont know why it is running rough at idle though. Could be a bunch of things. Not likely is it the oil though. Especially not not in the middle of the summer!
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