DERG - Oils are approved for use by brand name, not spec. A new brand will need to be extensively tested before clearance including lab tests and endurance running. Testing is the responsibility of the Type Certificate holder, results need to be approved by Certificating Authority.
RB211-535 uses 180deg oil, for many years, with no probs.
Eureka!
Last edited by CAAAD; 8th January 2011 at 14:39.
Reason: Forgot DERG