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).
Lubricant grade comparison chart for Vauxhall Motors Ltd.
| Identifier | ExFiles\Box 127\4\ scan0110 | |
| Date | 1st April 1938 | |
| Vauxhall Motors Ltd. -2- 1-4-38. Grade. 10. 20. 30. C.C. Wakefield. Castrol. Z.Z. CW. 20. AA{D. Abbot-Anderson} 30. Vacuum Oil Co. Mobiloil. Arctic Special. Arctic 20. A.{Mr Adams} Shell-Mex and B.P. Shell. - Single Double. Anglo-American. Essolube. 10. 20. 30. Redline Glico. Glico. Super Light. Extra Super Light. Super Medium. Price's Lubricants. Motorine. - M 20. D 30. Alexander Duckham. Adcol. - NPX. NPXX. Texas Oil Co. Texaco. C 10. D 20. E 30. Hope, Hartope and Co. Sprol. 10 20 30 Rimer Brothers Monarch. 10 20 30 H.{Arthur M. Hanbury - Head Complaints} J.{Mr Johnson W.M.} Mason. | ||