Rolls-Royce Archives
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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).
Changes to oil specifications and availability from various suppliers.

Identifier  ExFiles\Box 145\3\  scan0166
Date  24th March 1938
  
Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}6/MH.{M. Huckerby}24.3.38.

WAKEFIELDS. (1) "CW" used to be SAE.30 and then became 20, and on April 1st. will cease to exist.
(2) "XL" which for years has been SAE.50 will soon, according to Limb, be SAE.30, but is actually just thicker than this specification, being in the 40 range.

PRICES. (1) "M" was SAE.40 and is now 30. We were not told of the change.

SHELL. (1) "Aeroshell" no longer exists and is called "Triple". "Double" is now 30. "Single" was 30 and is now 20.

VACUUM. (1) "D" recommended for 3½ Bentleys is now almost unobtainable.
  
  


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