It was a smart move on Valvoline's part to introduce a high mileage diesel oil. They will have about nine months to get the product on the store shelves and people aware of it before the new diesel specifications and oils that meet them start entering the market in December.
With the proposed splitting into two groups of oils, people might be confused on what to use in older diesel equipment, and what is backward compatible. As long as it meets the spec, Valvoline just needs to point to the high mileage diesel oil and say that would be the best thing to use.