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The study of 10% ethanol blended gasoline (E10 gasoline) utilization has been conducted in the Japan Auto-Oil Program (JATOP). In order to clarify the impact of E10 gasoline on vehicle performances, exhaust emissions, evaporative emissions, driveability and material compatibility have been investigated by using domestic gasoline vehicles including mini motor vehicles which are particular to Japan. The test results reveal that E10 gasoline has no impact on exhaust emissions, engine startup time and acceleration period under the hot start condition, but a slight deterioration is observed in some test cases under the cold start condition using E10 gasolines with 50% distillation temperature (T50) level set to the upper limit of Japanese Industrial Standards (JIS) K 2202. Regarding evaporative emissions, the tested vehicles shows no remarkable increase in the hot soak loss (HSL), diurnal breathing loss (DBL) and running loss (RL) testing with E10 gasolines.

In this study influence of fatty acid methyl ester (FAME) blends in petroleum based diesel fuel on cold performance was investigated. First, influences on pour point (PP), cold filter plugging point (CFPP) and cloud point (CP) were evaluated for palm oil methyl ester (PME) and rape-seed oil methyl ester (RME) blends. RME-blended fuels showed similar properties to those of the base fuel. Thus, for vehicle tests, low temperature performance was examined with PME-blended fuels only. Startability and driveability were evaluated at varying temperatures using two vehicles (one old model and one new model). The results indicated that at low temperatures PME blends would deteriorate driveability performance.