Originally Posted by Campbell
After running regular oil for 130k i switched to mobil 1 10/30. Changed the filter every 500miles. I'm now getting a lot more lifter tap. Thinking about going to 0 40 or draining a quart and adding Lucas oil stabalizes. Or I might just do a oil flush product and go back to regular oil.
Answering your questions with more questions:
What weight of regular oil were you running?
Why the switch, assuming you are now running synth?
Does the lifter(s) tap constantly, only under load, only at idle, only at cold startup?
Is the tapping sound coming from only one area? front and/or rear of block? PS and/or DS bank?
How is your oil pressure?
Where do babies come from?