I wanted to add a picture of the kit referred to. I had it installed yesterday.
A good friend of mine is a moderator over on one of the Lexus forums and those vehicles in particular see this issue with a lot of carbon buildup in their intake manifolds and some use Seafoam which if not used right can have the unintended consequences of fouling up plugs and even frying and ignition coil (those P0300 codes and such). However, a few smart ones have done exactly this, gone to an oil catch can with a breather filter and avoided the issue altogether.
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