At the nearest Dollar Tree where I purchased 3 cases of 10w30, SM/GF-4 TropArtic Synthetic Blend is available in 5W-20, 5w30, and 10w30 if that's what you're asking. The 5W-X0's went on sale in very late 2004. The 10w30 wasn't introduced until early spring this year. When ConocoPhillips put out press releases last September that their upcoming SM motor oils would all be synthetic blends at no increase in pricing, the company may have inadvertently shot itself in the foot regarding pent-up demand - such is the marketing downside of "a better mousetrap". It's very possible some areas are still clearing out the older TropArtic SL/GF-3, non-synthetic blend oils. Supply will catch up with demand.