Havoline rocks. Valvoline is thought to have a pretty lame add pack, though the UOA's tend to look decent.
Havoline seems second to none in the UOA's in these pages, easily besting even the most expensive syntheics. Sounds strange, but that's the trend.
I picked up a 5 quart jug of Havoline 10W40 at Wally's last night for 6.42, which comes to around 1.28 per quart. It was the SL version, so I wonder how much Havoline will bump the price up for the SM stuff...
I think the Havoline brand will be easier to find than the Chevron Supreme, but as the other member mentions above it's the same oil.
Dan