oil 30 u00ae was used as a reference and a lot better than that of mixed semi synthetic fluid containing 60 of mineral oil with relation to the synthetic base with the trade name bd sep 60 u00ae table 1 shows a qualitative assessment of users 39 perception of performance aspects where vu means very unsatisfactory u u2014 unsatisfactory s u2014 satisfactory and vs u2014 very satisfactory in its form the bio lubricating fluid has a cod of 14 of the value of a synthetic fluid and in the order of 5 5 of that of a semi synthetic fluid considering the respective products diluted in the manner indicated the bio lubricating fluid has a cod of approximately 49 less than half of the value of the synthetic fluid as for the semi synthetic fluid the bio lubricating fluid a has a cod in the order of 19 less than 1 5 therefore it can be asserted that additivation among the products shown in tables 2 and 3 is similar however a cod of the bio lubricating fluid a is low exclusively due to the absence of any oily material in the formulation the analysis of biodegradability by the oecd method no 301 oecd guidelines for the testing of chemicals section 3 degradation and accumulation test no 301 ready biodegradability oecd organization for economic co operation and development showed that the biodegradability during a period of 20 days was 93 3 characterizing it as u201c readily biodegradable u201d the formulations of bio lubricants a b and c were subjected to field.