A quality survey of 80 samples of diesel fuels (B5) from 80 retail stations throughout Peninsular Malaysia was performed. The biodiesel contents in these B5 samples were in the range of 4.61 vol. % to 5.33 vol.%. The water contents of the samples were <200 mg kg^-1, meeting the stringent water requirements recommended by the car manufacturers. In addition, all the samples exhibited superior lubricity as indicated by a much shorter wear scar diameter compared to neat diesel. More importantly, 98% of the samples passed the oxidation stability test (PetroOXY) with an induction period of >65 min. Overall, the B5 diesel fuel sold was in full compliance with the Malaysian diesel fuel standard specification.