- Dec 25, 2002
- Outside smalltown, IL
quote:The data sheets on the Castrol site right now show Syntec 0W-30 with specs that we know belong to what we call GC around here, not the old made in USA group III stuff. It would be nice, other than adding further confusion, if they started making it here. And sold it more places than Autozone... Syntec data sheet
Originally posted by glxpassat: It may not be around much longer as I can't find any reference to SLX on Castrol's German or Australian web sites. They make reference to the 0W-40 and 10W-60 for full synthetics. The 0W-40 has the same HTHS @ 3.6 as GC and the viscosity at 100 = 12.9 whereas GC is 12.2, so it seems like the 0w-30 may have been replaced.