I say it is useful on the crankcase, dirty side.My experience is if I fill oil to full mark oil goes into intake until oil is almost half way between the marks.I looked at my intake on my lgx at 20 k and it was clean.I looked again at 30k and enough oil had got in intake to drain on air filter and dribble out weep hole.I changed the filter. 2 weeks later I took intake apart.Most of oil was gone and air filter was clean.I got intake cleaner and maf cleaner and cleaned up properly.My last oil change I filled up maybe a hair over full, it went into intake until about 1/3 way down from full.After that intake stayed clean. My focus st was same way. It had a damond dirty side can. It would not catch much unless I filled to top mark.I agree with elite about the lgx.It needs 93 to run it's best and cc is helpfull. I know the lgx is different in that it's dirty side vacuum is before throttle body. Elite do you have a link for lgx cc info.
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