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I just did my AOS a few weeks ago, I caught mine early before lots of oil smoke but the TB & tubes were pretty oily. Cleaning your plugs can't hurt but make sure to get as much of the oil residue out of the intakes as you can using lint free rags. Then add a can of Techron to the fuel & go for a nice long ride to get the remaining residue out & get the cats nice & hot.
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