I'll have to search but I don't think there's too much on the Valvoline Diesel oil here, I don't even know which parts stores sell it locally and I know Walmart doesn't in their stores... basically what I'm getting at is I don't think it's a very popular oil. I was really wanting the 10w30 because I've experienced the least consumption in my Civic's when I was using Delo XLE 10w30, I know different brand but they are both HDEO 10w30 and it's not many choices out there that is dual rated. Honestly I'll probably just start using Pennzoil Euro-L 5w30 and you can get it cheaper at Walmart locally here than buying the Valvoline version directly from them. I'd rather the Diesel oil was full synthetic but I've found that even a blend makes a huge difference with cold starts. The 5w40 is full synthetic but the 10w30 is a blend.