no, just dump the new stuff in. some people say if you mix synthethic and and nonsynth it may not mix well but I've never had a problem. Just make sure the oil is marked 'for injector systems' and you'll be fine.
-++-you can't spell jackass with out JKSC-++-
Joined: 18 Jun 2005
Location: Longfellow, Minneapolis
scootkulture, when I'm not running butter through there, I use Motul 710. I've been happy with it - but then I was happy with Ipone before that. I think all the full-synth oils are great - probably doesn't matter too much, frankly. Choose based on color or flavor!
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