Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › '05 Tundra Dirty Lower Intake › Reply To: '05 Tundra Dirty Lower Intake March 29, 2020 at 5:40 pm #953799 Richard KirshyParticipant The oil deposits may be due to your seeping gaskets. Along with the internal build up which also is due partly by the PCV system. You can minimize the pcv deposits by installing a oil catch can setup