Quote:
Originally Posted by jr_ss
I'm not sure where in your head you determined catch cans are strictly for old, poorly assembled or unhealthy engines. Either way that's your personal opinion and you're entitled to it.
If you pull a vacuum on your crank case, regardless of the quality of build you have, you are going to pull oil vapor out of it. If one doesn't want to have that oil vapor go back into their motor, lowering octane ratings and potentially damaging their motor, guess what? They add a catch can. Sure, it won't stop all, but it will prevent most from entering your engine.
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I have nothing to say about most of what you're saying, but:
I'm pretty certain that motor oil is higher octane than gasoline. I don't know for sure or anything, but.... it's AKI should be higher than diesel, given that in order to run a diesel on oil, you need to mix it with gas.
Of course, you don't want it in your intake. But I'm pretty sure you pulled the octane bit out of your ass, or out of SOMEBODY'S ass.