splash blending
n.— «S.C. fuel distributors mix the two together to produce a cleaner-burning fuel, which they sell to motorists. During the last few years, this mixing practice, called “splash blending” has become popular among fuel distributors, looking for ways to offset rising fuel price.» —“Gas issue might end up at pump” by Gina Smith The State (Columbia, South Carolina) June 3, 2008. (source: Double-Tongued Dictionary)