Finally got time to give my newly acquired FFR perentie a proper service - oil change /fuel filter etc -also cleaned sedimenter and mesh filter under lift pump which were both full of crap-amazed it was still running as well as it was -also decided to remove air filter to check/clean but much to my horror discovered it was missing -only had the inner safety one which was bit of a relief-anyway local truck place has a fleetguard air filter in stock - are the original donaldson ones any better?