Abstract
Pour point reversions of various lubricating oils containing one of three different type pour point depressants (naphthalene-chlorinated paraffin condensation product, phenol-chlorinated paraffin condensation product and polyalkylmethacrylate) were measured by sudden cooling-heating cycle method and Federal test method.
In the former test any pour point reversion was not recognized, but in the latter test a 2.57.5°C range of the pour point reversions was observed in all cases.
Polyalkylmethacrylate gave the most effective pour point depressions and the most stable pour point reversions among the additives.
