Visc @ 100C is 9.8 vs. 12.1 for GC. Highly doubt the HTHS is anything higher than 3.0 because it doesn't meet ACEA A3, MB 229.5, BMW LL-01 etc. And it's an SM rated oil. Give me the added zinc and phosphorus of the GC anyday. I'd pass, especially if you can still get GC.