DNV GL, together with marine insurers The Swedish Club, Norwegian Hull Club, Skuld and Gard have completed a study of the properties of environmentally acceptable lubricants (EALs) for stern tube applications, in response to the growing number of stern tube bearing failures recently. In fact, DNV GL sponsored lab tests demonstrating that EALs behave differently than traditional mineral oils under transient pressure and temperature conditions.
According to DNV GL, the majority of the observed...
https://safety4sea.com/dnv-gl-completes-study-on-the-properties-of-eals-for-stern-tube-applications/