BS 2000 is a series on methods of test for petroleum and its products. Petroleum and its products are materials derived from crude oil (petroleum) as it is processed in oil refineries. Unlike petrochemicals, which are a collection of well-defined usually pure organic compounds, petroleum products are complex mixtures. BS 2000-48 indicates the tendency of lubricating oil to deteriorate on oxidation under specified conditions. A measure of the deterioration is obtained by comparison of the viscosity and carbon residue before and after oxidation.
Note: The test is not suitable for additive-type oils (other than those containing ashless additives) or those which form solid products or lose more than 10% by evaporation during the test.
BS 2000-48 on the determination of oxidation characteristics of lubricating oil is useful for:
The majority of petroleum is converted to petroleum products, which includes several classes of fuels. BS 2000-48 defines a principle that states that The sample is subjected to relatively severe oxidation conditions by heating to 200 °C and passing air through it at 15 L/h for two periods of 6 h. After standing for 15 h to 30 h, the kinematic viscosity and Ramsbottom carbon residue of the oxidized oil are determined and compared with those from corresponding texts on the unoxidized oil. An alternative test procedure for the shortened version with a 12 h continuous oxidation period is given in BS 2000-48.
The full test period is three days, and this may cause difficulties in refineries where production and laboratory facilities are continuous. In these circumstances, where the test is being used for production control, it is permissible to use a shortened version with the 12 h continuous oxidation period, followed by immediate determination of the viscosity and Ramsbottom carbon residue of the oxidized oil. However, it is necessary for the test to be carried out in full in cases of dispute. the test report contains the information that includes a reference to this standard, the type and identification of the product tested, the result of the test (see Clause 9), any deviation, by agreement or otherwise, from the procedure specified and the date of the test. Using BS 2000-48 you can indicate the tendency of lubricating oil to deteriorate on oxidation under specified conditions.