I actually went to K-mart and Checked out that lifter noise stuff yesterday.Its actually made by, " NULON "and is called "LIFTER FREE & Tune UP. "and costs $10.49. I used it before on my EL and it seems to work after about 100Km of driving. Then you dont get any more annoying lifter noise until you change your Oil again.
Looks like the VL Holdung Commonwhores have the same lifter issues. Check this link out to the site:
http://forums.justcommodores.com.au/arc ... -1065.html