From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Oil sludge issues in the Phantom III chassis, comparing different motor oils.
| Identifier | ExFiles\Box 144\1\ scan0238 | |
| Date | 21th September 1936 | |
| Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer} x 1225 LA{L. A. Archer}9/T21.9.36 PHANTOM III CHASSIS On the above type chassis we have experienced a certain amount of trouble with the oil feed to the rocker mechanism, due to the filter through which all the oil has to pass to the hydraulic tappets, very quickly making up with a form of "sludge" It is interesting to note that on the five cars on which we have experienced this trouble have all been run on Prices Motorine 'O' I was able to get hold of Lord Portarlington's car which has run just over 5000 miles on Wakefield's Castrol Oil, and this filter was reasonably clean, and would have run at least another 5000 miles before it required cleaning. LA{L. A. Archer} | ||