We used Shell 100U oil in Bristol Hercules 672 (1690 BHP) and 734 (1980BHP) engines which are slightly smaller than the 'Taurus and the use of that oil doubled the engine TBO's to 2400 hours. Those engines in my humble opinion are pretty much pilot proof for on takeoff you just shove everything forward and leave it there to get 56.25 inches of manifold pressure, then reduce to METO by reducing the prop RPM to 2500, then to climb by reducing the prop RPM to 2200 and when in cruise reducing the prop RPM to whatever the book says, probably around 1850 RPM below 10,000.' Then and only then do you retard the throttles until they fall into a "cruise detent" (Economical Cruise Boost Bristol called it) and the fuel flow on each engine drops to about 60 imp. gal/hr. The mixture is automatic and the levers in what would be the mixture positions are but "Cut off" and "Run" levers. The fuel consumption on one engine is/was 177 imp gal/hr hence PNR's and CP's had to be calculated. The only engine problem could be caused by a bottom pot going out for the engine wanted to jump out of the airframe so you had to shut the thing down. I have about 40 hours on one engine out of about 5000 hours on Frighteners, and all except two were caused by spark plug failure on a bottom pot. The others were caused by a prop going into auto feather (Auto coarse pitching is the quaint term Bristol used for it) something Bristol said was not possible! If the Taurus engine failed in the Fury it could be mismanagement OR metal fatigue for some of those engines would have been overhauled many many times.