[BlazerLT]

One thing we should all be asking is:

1.) What grade of oil are you using?
2.) What filter are you using?
3.) Have you performed an engine flush ever?

The flush cured my ticking. Grab a bottle before you next oil change. Pu the car up on the ramp, pour in the flush and IDLE it for 30 minutes. Do not put it in and drive or even drive up on the blocks.

This stuff will turn even clean oil black as tar as it removes all the sludge blocking your lifters and your lubrication passageways.