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how much for engine flush 80K miles. OIl change every

5000 miles on 2009 Infiniti M35

Dealer said PVC clogged

Asked by for the 2009 Infiniti M35
Who told you an 'engine flush' would clean the PCV system? PVC is plumbing pipe :)....PCV is Positive Crankcase Ventilation , in other words ,the vapors produced by your engine , that used to just be blown off into the atmosphere , are now sucked back into the intake and burned . When your dealer told you your PCV system or valve was clogged what did they try to sell you , besides installing a new PCV valve if equipped and or cleaning any hoses or tubes involved in the system?