The synthetic oil you should run in it should be ester based not PAO based. The ester based oil will dissolve the deposits.
Where you are at I think you can get Motul 300V, a 100% Ester Based Racing Oil or Motul 8100 100% Ester Based Street Oil. Check this site. EuroSyntheticOils.com carry ELF and Motul Synthetic Lubricants.
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Michael D. Holloway
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