| Description | Date | Identifier | |
| The testing of an oil sample from The Henzell Oil Co. | 4th Feb 1914 | Box 32 \ 4 Scan075 | |
| The adoption of 'Prices oils' and the postponement of further oil testing. | 11th May 1914 | Box 32 \ 4 Scan076 | |
| Letter from Edgar Vaughan & Co. Ltd. proposing a meeting to discuss practical tests for motor oils. | 16th Dec 1919 | Box 32 \ 4 Scan077 | |
| To Mr. Hives regarding correspondence from the Central Oil Company about their motor oil. | 8th Jan 1920 | Box 32 \ 4 Scan078 | |
| Promotional letter from The Central Oil Company offering a sample of Superfine Motor Touring Oil. | 2nd Jan 1920 | Box 32 \ 4 Scan079 | |
| Declining to test HL Crane's Fine Motor Oils as they are pure mineral oils. | 9th Feb 1920 | Box 32 \ 4 Scan080 | |
| Sales letter from The Graphite Oils Company Ltd. offering 'Suspensor' brand motor oil for testing. | 9th Feb 1920 | Box 32 \ 4 Scan081 | |
| Enquiry from Handley Page Ltd. concerning the use of oils on engines. | 9th Jul 1920 | Box 32 \ 4 Scan082 | |
| Correspondence with Mr. Handley Page about lubricating oil for aeroplane engines in India. | 9th Jul 1920 | Box 32 \ 4 Scan083 | |
| Letter from Handley Page suggesting a new lubricating oil from Burmah Oil Co. for aircraft engines. | 1st Jul 1920 | Box 32 \ 4 Scan084 | |
| Letter to F. Handley Page concerning a delay in contacting Mr. Watson of the Burmah Oil Company due to works holidays. | 3rd Jul 1920 | Box 32 \ 4 Scan085 | |
| Letter from the Vacuum Oil Company regarding the forwarding of oil samples for testing purposes. | 10th Aug 1920 | Box 32 \ 4 Scan086 | |
| Offer from Sterns Ltd. regarding their AMBROLEUM gear oil and seeking an opinion before replying. | 15th Apr 1921 | Box 32 \ 4 Scan087 | |
| Forwarding correspondence from The British Oil & Turpentine Corporation Ltd regarding an Oil Testing Machine. | 18th May 1921 | Box 32 \ 4 Scan088 | |
| Declining to test an unfamiliar oil from the Central Oil Company. | 28th May 1921 | Box 32 \ 4 Scan089 | |
| Letter from Henry Wells Oil Co. promoting their 'Germ Process' Motoils. | 3rd Jun 1921 | Box 32 \ 4 Scan090 | |
| Letter from Sun Company of Canada submitting samples of oil and grease for approval. | 7th Feb 1921 | Box 32 \ 4 Scan091 | |
| Laboratory report detailing the results of an oil viscosity test. | 7th Sep 1921 | Box 32 \ 4 Scan092 | |
| Receipt and potential testing of Clynol 'C' Motor Oil samples from a customer. | 23th Sep 1921 | Box 32 \ 4 Scan093 | |
| Lubricating oil recommendations for Paris, discussing the unavailability of standard oils and considering alternatives. | 7th Oct 1921 | Box 32 \ 4 Scan094 | |
| Chasing a reply regarding lubricating oils and forwarding a note from the Paris Depot. | 14th Oct 1921 | Box 32 \ 4 Scan095 | |
| Unreliability of French lubricating oils and the proposal to standardize on Wakefield's Castrol and Vacuum oils. | 10th Oct 1921 | Box 32 \ 4 Scan096 | |
| Suitable lubricating oils for use in France and the recommended brands. | 15th Oct 1921 | Box 32 \ 4 Scan097 | |
| Customer's query about using Texaco engine lubricating oil for chassis 1662. | 31th Oct 1921 | Box 32 \ 4 Scan098 | |
| Requesting a copy of a report on the difficulty of obtaining lubricating oils abroad. | 8th Nov 1921 | Box 32 \ 4 Scan099 | |
| Difficulty in obtaining lubricating oils abroad. | 9th Nov 1921 | Box 32 \ 4 Scan100 | |
| Letter from Henry Wells Oil Co. concerning 'Germ Process' lubricating oils and an article in 'The Automobile Engineer' magazine. | 13th Dec 1921 | Box 32 \ 4 Scan101 | |
| Letter detailing the dispatch of H.L. Engine oil and L.L. Gear oil to the Franco-Egyptian Company for testing purposes. | 10th Feb 1922 | Box 32 \ 4 Scan102 | |
| Potential use of Shell lubricating oil, pending Mr. Royce's approval. | 13th Mar 1922 | Box 32 \ 4 Scan103 | |
| Summary of a meeting with Shell-Mex regarding the testing of their lubricating oil for Aero and Car engines. | 27th Feb 1922 | Box 32 \ 4 Scan104 | |
| Suitable lubricants for the Goshawk and 40/50 car models and the sourcing of oil supplies. | 14th Mar 1922 | Box 32 \ 4 Scan105 | |
| Letter from Sir Arthur Duckham about a new lubricant and suggesting a sample be obtained for testing. | 15th Mar 1922 | Box 32 \ 4 Scan106 | |
| Providing a recommended response to inquiries about 'Miracle Oil'. | 20th Jun 1922 | Box 32 \ 4 Scan107 | |
| Laboratory report comparing the viscosity and flash points of l'huile 'M.13.5' and 'M9.5' against Prices' oils. | 11th Apr 1922 | Box 32 \ 4 Scan108 | |
| Internal enquiry regarding the experimental results of 'Miracle Oil' due to customer interest. | 9th Aug 1922 | Box 32 \ 4 Scan109 | |
| Customer enquiries about 'Miracle Oil', which is considered a fake. | 1st Aug 1922 | Box 32 \ 4 Scan110 | |
| Suggested reply to a customer enquiry regarding the use of 'Miracle Oil'. | 1st Sep 1922 | Box 32 \ 4 Scan111 | |
| Recommended standard reply to customer enquiries regarding 'Miracle Oil'. | 1st Sep 1922 | Box 32 \ 4 Scan112 | |
| Oil testing communication from Shell-Mex Limited and a concluded arrangement with Price Company. | 26th Sep 1922 | Box 32 \ 4 Scan113 | |
| Request from Shell Mex Company to test lubricating oil for cars. | 18th Sep 1922 | Box 32 \ 4 Scan114 | |
| Letter from Shell-Mex Limited requesting an engine test of their lubricating oils for the Rolls Royce car. | 15th Sep 1922 | Box 32 \ 4 Scan115 | |
| Continuation sheet of a letter from Shell-Mex Limited regarding sending a representative to discuss a matter. | 15th Sep 1922 | Box 32 \ 4 Scan116 | |
| Policy and impracticality of testing all submitted brands of oil, using Shell Mex as an example. | 27th Oct 1922 | Box 32 \ 4 Scan117 | |
| Process of testing and returning parts. | 12th Dec 1922 | Box 32 \ 4 Scan118 | |
| Trial for 'New Process Oil' from Alex: Duckham & Co. Ltd. | 12th Dec 1922 | Box 32 \ 4 Scan119 | |
| Request for a standardized response to customer inquiries about 'Miracle Oil'. | 20th Dec 1922 | Box 32 \ 4 Scan120 | |
| Follow-up request for information regarding 'Miracle Oil'. | 4th Jan 1923 | Box 32 \ 4 Scan121 | |
| Analysis of 'Miracle Oil' and its effects on valve wear, with a recommendation to test standard lubricating oil mixed with petrol. | 1st Jan 1923 | Box 32 \ 4 Scan122 | |
| Efficacy and composition of 'Miracle Oil' and proposing wording for customer responses. | 11th Jan 1923 | Box 32 \ 4 Scan123 | |
| The effectiveness of 'Miracle Oil' and a suggested statement on its use. | 13th Jan 1923 | Box 32 \ 4 Scan124 | |
| Claims and effectiveness of 'Miracle Oil' in preventing carbon buildup in engines. | 15th Jan 1923 | Box 32 \ 4 Scan125 | |
| Letter from Alexander Duckham & Co. Ltd regarding the adoption of a new process motor oil. | 27th Feb 1923 | Box 32 \ 4 Scan126 | |
| Letter from Alexander Duckham & Co. Ltd. detailing oil test results from various motor manufacturers. | 27th Feb 1923 | Box 32 \ 4 Scan127 | |
| Copy of test results comparing two different types of oil: 'New Process Oil' and 'Motorine 'C''. | 27th Feb 1923 | Box 32 \ 4 Scan128 | |
| Advertisement for Alexander Duckham & Co.'s New Process Oil, detailing its benefits against heat and carbon deposit formation. | 8th Mar 1923 | Box 32 \ 4 Scan129 | |
| Letter arranging for a 6-month test of 20 gallons of oil on an experimental car. | 8th Mar 1923 | Box 32 \ 4 Scan130 | |
| Letter from Alexander Duckham & Co. Ltd regarding the supply of motor oil for testing on an experimental car. | 10th Mar 1923 | Box 32 \ 4 Scan131 | |
| Requesting a requisition for New Process Motor Oil after receiving an invoice from Messrs. Alex. Duckham & Co. | 3rd May 1923 | Box 32 \ 4 Scan132 | |
| Receiving a cask of Adcol Motor Oil without instruction and requesting copies of requisitions in the future. | 27th Mar 1923 | Box 32 \ 4 Scan133 | |
| Request to order one cask of 'New Process' Adcol Motor Oil from Messrs. Alex. Duckham for experimental purposes. | 7th May 1923 | Box 32 \ 4 Scan134 | |
| Seeking confirmation regarding the practice of testing oils and charging suppliers for the service. | 7th Jun 1923 | Box 32 \ 4 Scan135 | |
| Advertising leaflet for Miracle Oil, an upper cylinder lubricant for petrol and benzol engines. | 8th Jan 1923 | Box 32 \ 4 Scan136 | |
| Informational leaflet promoting 'Miracle Oil' and its benefits for the lubrication of internal combustion engines. | 8th Jan 1923 | Box 32 \ 4 Scan137 | |
| Order form for 'Miracle Oil' to be sent to The Contract & Works Supply Co. in Nottingham. | 8th Jan 1923 | Box 32 \ 4 Scan138 | |
| Order form from The Centaur & Works Supply Co. for Minerva Oil. | 31th Aug 1923 | Box 32 \ 4 Scan139 | |
| Inspection report on the use of 'Miracle Oil' as a petrol additive for Chassis No.3-PG. | 31th Aug 1923 | Box 32 \ 4 Scan140 | |
| Use of 'Miracle Oil' as a petrol additive for Sir Emsley Carr's Chassis No. 3-PG. | 4th Sep 1923 | Box 32 \ 4 Scan141 | |
| Customer's inquiry about using 'Adcol' brand oil in their car, chassis number 55-S-8. | 13th Sep 1923 | Box 32 \ 4 Scan142 | |
| Letter from Alexander Duckham & Co. Ltd. regarding the composition and testing of 'NEW PROCESS' engine oil. | 5th Sep 1923 | Box 32 \ 4 Scan143 | |
| Analysis and suitability of 'ADCOL' OIL as a lubricant. | 12th Nov 1923 | Box 32 \ 4 Scan144 | |
| Performance of various lubricating oils and recommending 'Wakefields XL' for further testing. | 15th Nov 1923 | Box 32 \ 4 Scan145 | |
| Forwarding a copy of recommendations for lubricants to be used on Springfield-made chassis. | 10th Dec 1923 | Box 32 \ 4 Scan146 | |
| Service bulletin memo detailing a larger and modified list of recommended oils. | 27th Oct 1923 | Box 32 \ 4 Scan147 | |
| Recommendations for lubricants for the gearbox, steering box, water pump, and pressure gun. | 27th Oct 1923 | Box 32 \ 4 Scan148 | |
| Request from Alexander Duckham & Co. for an endorsement of their Adcol oil, and the proposed refusal. | 17th Dec 1923 | Box 32 \ 4 Scan149 | |
| Dissatisfaction with Price's lubricating oil and plans to test alternatives. | 18th Dec 1923 | Box 32 \ 4 Scan150 | |
| Complaint on Chassis No. 60-3-G and the consideration of an alternative to Prices Oil. | 22th Dec 1923 | Box 32 \ 4 Scan151 | |
| Attaching blueprints with particulars of tests taken on Ragosine oil. | 16th Jan 1924 | Box 32 \ 4 Scan152 | |
| Letter from oil refiners James White, Abbott & Co offering a sample of Glissade 'S' Brand motor oil. | 20th Feb 1924 | Box 32 \ 4 Scan153 | |
| Lubricant sample called 'Petroyle' from Edward Joy & Sons Ltd, for testing purposes. | 27th Feb 1924 | Box 32 \ 4 Scan154 | |
| Policy of recommending alternative oils versus selling a specific brand for profit. | 3rd Apr 1924 | Box 32 \ 4 Scan155 | |
| Customer's query about using Benzole fuel and Duckham's lubrication oil in a 20 HP chassis. | 3rd Apr 1924 | Box 32 \ 4 Scan156 | |
| On carburettor float materials, benzol corrosion, and testing Duckhams oil for the 20 HP car. | 4th Apr 1924 | Box 32 \ 4 Scan157 | |
| Direct reply concerning alternative lubricating oil due to an absence. | 23th Apr 1924 | Box 32 \ 4 Scan158 | |
| Query regarding a recommendation to modify the engine oil change interval from 5000 miles. | 30th Apr 1924 | Box 32 \ 4 Scan159 | |
| Proposing the use of alternative lubricating oils to avoid dependency on a single supplier. | 5th May 1924 | Box 32 \ 4 Scan160 | |
| The shipment of two 50-gallon drums of oil to a recipient in France. | 2nd May 1924 | Box 32 \ 4 Scan161 | |
| Difficulties obtaining import licences for oil being sent to France. | 1st May 1924 | Box 32 \ 4 Scan162 | |
| Cover note forwarding a letter from France to be taken up with Messrs. Alex. Duckham. | 27th May 1924 | Box 32 \ 4 Scan163 | |
| Letter from Chateauroux, France to Derby regarding the receipt and use of Castrol engine oil. | 2nd Jun 1924 | Box 32 \ 4 Scan164 | |
| Responding to an enquiry about the use of Catlin Shale Products Company oil in cars. | 7th Jul 1924 | Box 32 \ 4 Scan165 | |
| Customer's insistence on using Butterworth's oils for chassis 61-EL. | 8th Aug 1924 | Box 32 \ 4 Scan166 | |
| Requesting remarks regarding the use of Butterworth's oils on chassis 61-EM.Serpell. | 18th Aug 1924 | Box 32 \ 4 Scan167 | |
| Declining to recommend Butterworths Oils due to a lack of experience. | 21th Aug 1924 | Box 32 \ 4 Scan168 | |
| Letter from the American to the UK branch discussing Veedol and Fordol engine oils, their viscosity, and recommended usage. | 29th Aug 1924 | Box 32 \ 4 Scan169 | |
| Page 2 of a letter to Mr. Hives concerning the Tide Water Oil Company. | 29th Aug 1924 | Box 32 \ 4 Scan170 | |
| Letter discussing Veedol oil grades from the Tide Water Oil Company, their viscosity, and suitability for different markets. | 29th Aug 1924 | Box 32 \ 4 Scan171 | |
| Letter to Mr. Hives concerning the Tide Water Oil Company. | 29th Aug 1924 | Box 32 \ 4 Scan172 | |
| Table of physical characteristics for different grades of Veedol Motor Oil. | 20th Aug 1924 | Box 32 \ 4 Scan173 | |
| To the Accounts Department to cancel an invoice for oil mistakenly sent to Monsieur A. Trone, which was for experimental cars. | 20th Aug 1924 | Box 32 \ 4 Scan174 | |
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