Shipp nonionic (SNI) fuel containing 50% No. 2 diesel fuel, 25% degummed and alkali-refined soybean oil, 5% 190-proof ethanol and 20% 1-butanol was evaluated in the 200 h EMA screening test (Goering and Fry, 1984a). The fuel properties are summarized in Table 5. The fuel passed the 200 h EMA test, but carbon and lacquer deposits on the injector tips, in-take valves and tops of the cylinder liners were major problems. The SNI fuel performed better than a 25% blend of sunflower oil in diesel oil. The engine performances were the same for a microemulsion of 53% sunflower oil and the 25% blend of sunflower oil in diesel (Ziejewski et al., 1983). A microemulsion prepared by blending soybean oil, methanol, 2-octanol and cetane improver in the ratio of 52.7:13.3:33.3:1.0 also passed the 200 h EMA test (Goering, 1984b).