[lbszr]

Originally Posted by Z Factor

^^^ According to this chart it looks like it is one of two in the Zerex line that meet GM 1825 spec.

http://www.englefieldoil.com/PDF/Zerex_chart.pdf

The local Chevy dealer carries original Zerex, but it's about a dollar cheaper at Savage auto parts. It says on the bottle it has silocates.