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).
The effects of B.P. Plus fuel on air valve deposits and staining compared to standard fuel and Ethyl spirit.
| Identifier | ExFiles\Box 47\3\ Scan293 | |
| Date | 23th November 1931 | |
| W/S. H.{Arthur M. Hanbury - Head Complaints} From Hs{Lord Ernest Hives - Chair}/Ltd. c. to Br.{T. E. Bellringer - Repair Manager} 8417. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}2/MJ.23.11.31. GAJ-57. Miss Latilla. With reference to H.6/H19.11.31. there is no reason for the statement that B.P. plus causes a deposit liable to make the air valve stick to any greater degree than when using standard fuel. B.P.Plus contains only a very small percentage of lead, certainly not sufficient to have any detrimental effect on the air valve. There is a possibility that the blue dye used in this petrol has the effect of making the deposit on the air valve a darker colour than normally and thus causing it to be more prominent. If we use Ethyl spirit a red stain is apparent on the air valve due to the red dye, and in the same way we should expect B.P. Plus to leave a blue stain. Hs{Lord Ernest Hives - Chair}/A.J.Lidsey. | ||