Technical Paper
Evaluation of Engine Oil Performance with B5 and B20 Biodiesel in a Taxi Fleet Test
2012-09-10
2012-01-1706
The addition of 7% FAME (Fatty Acid Methyl Ester) is mandated in a number of European countries since 2008. Higher FAME concentrations up to 30% are used by fleets in some countries. Passenger car manufacturers have reported on the negative technical implications of biodiesel on engine oil dilution, engine cleanliness and corrosion. The reason for the impact of FAME can be attributed to the higher boiling point compared to fossil fuel and the lower oxidation stability due to the presence of unsaturated fatty acid components. In this study engine oils with different performance level were evaluated in a taxi fleet test run with B5 and B20 biodiesel. The test results are illustrated with the used oil analyses and the performance of the engine oils by end-of-test engine inspections.
