Since Chevron bought out Texaco, er, "merged", several years ago, Havoline (also using Group II lube base stocks according to the backside blather on the bottles) is for all practical purposes identical*, viscosity grade for grade, to Chevron Supreme if local availabilty of CS is a problem. I'm coming up on 12,000 miles in a Hyundai 2.7L V6 with Havoline 10W-30 conventional in the sump over the past three consecutive 3,000 mile OCIs. I'm considering having Blackstone conduct a UOA of a drain-off sample.
*The conventional Havoline product data sheets are identical to the conventional Chevron Supreme data sheets in all parameters except for 0.2 marginally higher TBN figures across the board. Could be for real, could be a typo, could be from different sample batches. Since the variance is a constant 0.2 figure, my gut tells me the "difference" is a typo. Regardless, I doubt there's any appreciable advantage in how well the oil staves off the effects of acids over the OCI.