I might be able to help you flush out the old oil. We have a flushing oil that you add to the exsisting - takes 1 qt for every 10 in the system. Let it circulate for a few days then drop it out. It is very safe. It doen't contain any acids or solvents. I have used it on my Targa and all my other cars as well as hudreds of different engines including turbo chraged ones. If you would like I can send you some. Just PM me.
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Michael D. Holloway
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