Recent content by justn

  1. justn

    Oil for 2002 Jeep Grand Cherokee v8

    Originally Posted By: BrocLuno Another Cali here. I know what you are up against. So there are a few things to try, Replace the PCV system components that look bad. Hard hoses, obviously a new OEM PCV valve, grommets, etc. While you are in there looking at stuff, see how bad the oil film is...
  2. justn

    Oil for 2002 Jeep Grand Cherokee v8

    Originally Posted By: Nick1994 I'd start off with a 10w40. 10w30 HM oils aren't some magic elixir in a bottle, might as well tackle it head on and see what it does. Thanks for the advice on the oil viscosity!
  3. justn

    Oil for 2002 Jeep Grand Cherokee v8

    Thanks for all of the recommendations, they are greatly appreciated. I've replaced the PCV valve but nothing else around it. I'll check for cracks in hoses and look for leaks too. From what you're all saying, I'll definitely be changing over to a heavier oil. Should I jump to a 10w40 or start...
  4. justn

    Oil for 2002 Jeep Grand Cherokee v8

    Hello all, I'm new here and looking for an oil recommendation for my 2002 Grand Cherokee with the 4.7l v8. It currently has 162,000 miles on the odometer. Owners manual says 5W-30 viscosity is preferred with the API symbol. It also lists 10W-30 for temperature ranges from 0º F to 100ºF and...
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