OP, can you verify if it only happens in neutral as your original post reads?

Also does it happen when you first start it or when engine cold?

 

OP, I would use the DT40 oil. Follow the instructions for changing, use the DT break-in oil for a few miles then do the switch to DT40. Using the break-in first ensures most of the old oil is replaced. You can buy it from LN Engineering or Joe Gibbs Driven.

 

I would echo this! My 99 with 90K miles started ticking on cold start after my indie put M1 15-50 and got no better with Castrol 10-60. After 2 changes with 05-40W DT40 it's almost non existent unless the car has been sitting for a week.

 

When you heard the ticking, does it go away when you depress your clutch? A friend of mine had his clutch replaced and when he got it back he would hear a ticking noise when it was in neutral and clutch pedal up. Once he depressed the clutch the ticking went away.