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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).
Test report on Phantom III oil consumption comparing results with and without outside oil drains.

Identifier  ExFiles\Box 144\3\  scan0168
Date  23th February 1937
  
1220

To Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}                    23.2.37.

    Phantom III Oil Consumption.

A.{Mr Adams}    To obtain a value for the outside oil drain pipes we have run two tests without valve grummets, but with the new long valve guides fitted.

    1st Test. -------- No outside oil drains.
             Average speed...47 mph.
             Mileage......... 200.
             Consumption....355 mpg.

B.    2nd Test.
             With outside oil drains.
             Average speed ... 47 mph.
             Mileage......... 200.
             Consumption..... 580 mpg.

Result of test.

The outside oil drains are worth 63% in oil consumption.

                    Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}
  
  


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