| Description | Date | Identifier | |
| The testing of arriving oil from Vacuum Oil Co. Ltd. | 11th Aug 1920 | Box 144 \ 1 scan0052 | |
| Vacuum Oil Co. Ltd. | 5th Aug 1920 | Box 144 \ 1 scan0053 | |
| Letter to Vacuum Oil Co. Ltd. requesting a two-gallon oil sample for engine testing. | 4th Aug 1920 | Box 144 \ 1 scan0054 | |
| Seeking advice regarding correspondence with Vacuum Oil Co. Ltd. | 12th Aug 1920 | Box 144 \ 1 scan0055 | |
| Forwarding a letter received from Vacuum Oil Co. Ltd. | 11th Aug 1920 | Box 144 \ 1 scan0056 | |
| Letter from the Vacuum Oil Company regarding the supply of oil samples for engine testing. | 10th Aug 1920 | Box 144 \ 1 scan0057 | |
| Letter from Vacuum Oil Company Ltd. offering the services of their technical representative to visit and collaborate. | 10th Aug 1920 | Box 144 \ 1 scan0058 | |
| Letter from V.O.Co.Ltd. confirming the dispatch of Gargoyle Mobiloil samples for testing. | 10th Aug 1920 | Box 144 \ 1 scan0059 | |
| Correspondence and testing of oil from Vacuum Oil Co. Ltd. | 5th Aug 1920 | Box 144 \ 1 scan0060 | |
| Confirming a letter has been sent to the Vacuum Oil Co. Ltd. | 5th Aug 1920 | Box 144 \ 1 scan0061 | |
| Letter to Vacuum Oil Co. Ltd. requesting an oil sample for testing on engines. | 4th Aug 1920 | Box 144 \ 1 scan0062 | |
| Testing and potential use of Vacuum Oil versus Castrol oil and the company's reluctance to recommend it. | 15th Nov 1920 | Box 144 \ 1 scan0063 | |
| Comparison of engine starting tests using Prices' 'C' Oil and Castrol Oil. | 14th Dec 1920 | Box 144 \ 1 scan0064 | |
| Motor starter tests comparing performance with Prices 'C' Oil and Castrol Oil at various temperatures. | 11th Aug 1920 | Box 144 \ 1 scan0065 | |
| Concerns about grit found in Price's Belgraphine Grease affecting car parts. | 21th Apr 1921 | Box 144 \ 1 scan0066 | |
| Suitable lubricating oils for use in France. | 15th Oct 1921 | Box 144 \ 1 scan0067 | |
| Approved use of Vacuum Oil in cars, especially its availability in France compared to other recommended oils. | 24th Oct 1921 | Box 144 \ 1 scan0068 | |
| Difficulty in obtaining lubricating oils abroad. | 9th Nov 1921 | Box 144 \ 1 scan0069 | |
| Request to test new grease samples from Prices' Co. Ltd. for potential standardisation against the existing Duckham grease. | 8th Feb 1922 | Box 144 \ 1 scan0070 | |
| 12-month lubricant supply proposal from the company Prices, weighing the special terms against potential quality risks. | 7th Feb 1922 | Box 144 \ 1 scan0071 | |
| Continued use of Prices Oil lubricants and the possibility of a twelve-month contract. | 10th Feb 1922 | Box 144 \ 1 scan0072 | |
| Comments on the properties and applications of various greases submitted for testing. | 13th Feb 1922 | Box 144 \ 1 scan0073 | |
| Lubricants for the Goshawk and 40/50 car models and the relationship with the supplier 'Prices'. | 13th Mar 1922 | Box 144 \ 1 scan0074 | |
| 12-month lubricant supply agreement with Prices' Oil Co. for cars and the Goshawk engine. | 10th Mar 1922 | Box 144 \ 1 scan0075 | |
| Letter discussing suitable lubricating oils for cars in France, following piston seizures with a previous oil. | 23th Jun 1922 | Box 144 \ 1 scan0076 | |
| Analysing the costs and viability of selling Price's Oil in France. | 22th Jun 1922 | Box 144 \ 1 scan0077 | |
| Strategy for reselling engine and gear oil in France. | 22th Jun 1922 | Box 144 \ 1 scan0078 | |
| Chasing a response regarding a report on previously sent oil samples. | 8th Jul 1922 | Box 144 \ 1 scan0079 | |
| Requesting a reply regarding samples of oil sent for the sale of Prices' Oil in France. | 10th Aug 1922 | Box 144 \ 1 scan0080 | |
| Analysis of oil samples from Paris and advice regarding caution with new suppliers. | 22th Aug 1922 | Box 144 \ 1 scan0081 | |
| Seeking agreement on recommending the same oils for the 20 HP and 40/50 HP models. | 3rd Nov 1922 | Box 144 \ 1 scan0082 | |
| Letter from Prices' Company Limited inquiring about the suitability of their oils for the new 20 HP six-cylinder car. | 2nd Nov 1922 | Box 144 \ 1 scan0083 | |
| Querying the correct grade of Prices Oils to be used for the 20 HP car. | 6th Nov 1922 | Box 144 \ 1 scan0084 | |
| Renewal of a sales arrangement for Price's Lubricants for cars. | 8th Dec 1922 | Box 144 \ 1 scan0085 | |
| Possibility of a twelve-month contract for lubricants from Prices Oil. | 10th Feb 1922 | Box 144 \ 1 scan0086 | |
| Suitable lubricants for the Goshawk and 40/50 car models and the supply relationship with Prices. | 13th Mar 1922 | Box 144 \ 1 scan0087 | |
| Recommendation to renew the lubricant supply arrangement with the company 'Prices' for a further 12 months. | 18th Dec 1922 | Box 144 \ 1 scan0088 | |
| Faulty bearings and unsatisfactory oil in the 20-HP model due to deteriorated Prices Oil. | 12th Nov 1923 | Box 144 \ 1 scan0089 | |
| Oil performance, wear, and potential remedies for a 20HP 10,000-mile chassis. | 23th Nov 1923 | Box 144 \ 1 scan0090 | |
| Renewal of a contract for chassis lubricants with Price's Patent Candle Company. | 30th Nov 1923 | Box 144 \ 1 scan0091 | |
| Dissatisfaction with Price's Motorine oil and advising caution on future oil contracts. | 4th Dec 1923 | Box 144 \ 1 scan0092 | |
| Dissatisfaction with Price's lubricating oil and the testing of alternatives. | 18th Dec 1923 | Box 144 \ 1 scan0093 | |
| Lubricating oils and a new product called 'Zero Huile de Luxe'. | 18th Dec 1923 | Box 144 \ 1 scan0094 | |
| Responding to a complaint on Chassis No. 60-S-G regarding the use of an alternative oil. | 22th Dec 1923 | Box 144 \ 1 scan0095 | |
| Oil testing data and the receipt of a new 'Winter Huile de Luxe' sample from Price's. | 24th Mar 1924 | Box 144 \ 1 scan0096 | |
| Commercial and reputational implications of recommending alternative lubricating oils. | 4th Apr 1924 | Box 144 \ 1 scan0097 | |
| Proposal to recommend alternative lubricating oil brands to avoid reliance on a single supplier. | 5th May 1924 | Box 144 \ 1 scan0098 | |
| Inability to obtain import licenses for oil in France and the necessary action required by the manufacturers. | 23th May 1924 | Box 144 \ 1 scan0099 | |
| Letter concerning the dispatch of 'Huile de Luxe' oil to France, including a quote from Prices Co Ltd. | 30th May 1924 | Box 144 \ 1 scan0100 | |
| Letter from Hernu, Peron & Co. Ltd. regarding a delayed oil consignment at Boulogne customs. | 10th Jul 1924 | Box 144 \ 1 scan0101 | |
| Laboratory analysis of two samples of Amber Gear Oil, marked A and B. | 17th Oct 1924 | Box 144 \ 1 scan0102 | |
| Properties of lubricating oils, clarifying that chassis and gearbox oils are mineral, not compound. | 17th Oct 1924 | Box 144 \ 1 scan0103 | |
| Recommendation for lubricating and turning over engines for cars standing with coachbuilders. | 29th Dec 1924 | Box 144 \ 1 scan0104 | |
| Laboratory analysis report comparing the properties of Motorine 'C' and Vacuum BB oils. | 29th Dec 1924 | Box 144 \ 1 scan0105 | |
| Use of mineral oil versus compound oil, citing piston squawk issues on the 20 HP model. | 30th Dec 1924 | Box 144 \ 1 scan0106 | |
| Continued report page comparing oil types and recommending British suppliers. | 1st Jan 1925 | Box 144 \ 1 scan0107 | |
| Use of mineral oil to resolve piston squawks on 20 HP cars. | 1st Jan 1925 | Box 144 \ 1 scan0108 | |
| Typed memorandum regarding an unresolved customer car issue and the recommendation to use mineral oil. | 1st Jan 1925 | Box 144 \ 1 scan0109 | |
| The use of mineral oil in cars, addressing issues of acidity and 'squawks' in 20 HP models. | 1st Jan 1925 | Box 144 \ 1 scan0110 | |
| The difficulties arising from recommending a specific compound oil. | 1st Jan 1925 | Box 144 \ 1 scan0111 | |
| Laboratory report detailing the results of viscosity tests on various oils at different temperatures. | 29th Jan 1925 | Box 144 \ 1 scan0112 | |
| Graph showing the viscosity of Price's Motorine 'C' oil at various temperatures. | 24th Oct 1925 | Box 144 \ 1 scan0113 | |
| Test results and evaluation of Shell 'siper' light racing oil compared to other compound and fatty oils. | 24th Oct 1925 | Box 144 \ 1 scan0114 | |
| Internal query about the approved use of 'Prices Oleogene Oil' in 20-HP cars. | 21th Jan 1926 | Box 144 \ 1 scan0115 | |
| Use of Oleogene Oil to prevent cylinder rust and corrosion. | 26th Jan 1925 | Box 144 \ 1 scan0116 | |
| Recommending Wakefield's Castrol oil as an alternative to Prices oil due to superior availability, particularly in France. | 29th Jan 1926 | Box 144 \ 1 scan0117 | |
| Clarifying the permissible use of Prices Oleogene Oil in 20-HP chassis engines during the testing stages. | 2nd Feb 1926 | Box 144 \ 1 scan0118 | |
| Dispatch instruction for two tins of oil to be sent to Messrs. C.C. Wakefield. | 1st Feb 1926 | Box 144 \ 1 scan0119 | |
| Need for a complete analysis of Wakefields and Prices oil by an outside laboratory. | 1st Feb 1926 | Box 144 \ 1 scan0120 | |
| Chasing a laboratory report on Wakefields and Prices oils. | 2nd Feb 1926 | Box 144 \ 1 scan0121 | |
| Cover letter to Wakefield & Co. Ltd. sending a chemist's report on 'XL' Oil for their review and comments. | 24th Feb 1926 | Box 144 \ 1 scan0122 | |
| Report from the London Midland & Scottish Railway Co. comparing the properties of two oil samples, 'A' and 'B'. | 22th Feb 1926 | Box 144 \ 1 scan0123 | |
| Report comparing two oil samples, 'A' (Prices Motorine 'C') and 'B' (Wakefields 'XL'), based on a heat and viscosity test. | 27th Feb 1926 | Box 144 \ 1 scan0124 | |
| Request for the specification of Prices Motorine 'B' and 'C' oil. | 27th Feb 1926 | Box 144 \ 1 scan0125 | |
| Suitability of Duckhams Adcol oil versus the recommended Prices oil. | 27th Feb 1926 | Box 144 \ 1 scan0126 | |
| From ROY regarding Price's Company's response about the constituents of their 'Motorine' Oils, which they consider a trade secret. | 5th Mar 1926 | Box 144 \ 1 scan0127 | |
| Letter from a supplier discussing the composition and testing peculiarities of Motorine B and Motorine C oils. | 4th Mar 1926 | Box 144 \ 1 scan0128 | |
| The refusal of an oil supplier to provide a product specification. | 8th Mar 1926 | Box 144 \ 1 scan0129 | |
| Specification and analysis of Prices Oil. | 8th Mar 1926 | Box 144 \ 1 scan0130 | |
| Specification sheet for Prices Oil, detailing its physical and chemical properties. | 16th Mar 1926 | Box 144 \ 1 scan0131 | |
| Constituents of Price's 'Motorine' Oils and a proposed response. | 16th Mar 1926 | Box 144 \ 1 scan0132 | |
| Letter from Price's Patent Candle Company Ltd. commenting on the laboratory examination of Motorine C. | 15th Mar 1926 | Box 144 \ 1 scan0133 | |
| Testing and recommendation of alternative lubrication oils to 'Prices' oil. | 16th Mar 1926 | Box 144 \ 1 scan0134 | |
| Continued report comparing the availability and quality of various oils like Wakefields, Prices, and Vacuum. | 22th Feb 1926 | Box 144 \ 1 scan0135 | |
| Report from the London Midland & Scottish Railway Co. on the chemical analysis and examination of two oil samples. | 22th Feb 1926 | Box 144 \ 1 scan0136 | |
| Report page comparing the heat test results of two oil samples, 'A' (Prices Motorine 'C') and 'B' (Wakefields 'XL'). | 10th Mar 1926 | Box 144 \ 1 scan0137 | |
| Letter from C.C. Wakefield & Co. Ltd. refuting conclusions from an oil test report on Motorine 'C' and Castrol 'XL'. | 10th Mar 1926 | Box 144 \ 1 scan0138 | |
| Laboratory report and criticism on two different oils, labelled A and B. | 15th Mar 1926 | Box 144 \ 1 scan0139 | |
| The refusal of an oil supplier, Prices, to provide a specification for their lubricant. | 17th Mar 1926 | Box 144 \ 1 scan0140 | |
| Preferential terms for lubricants and the consideration of an alternative oil supplier. | 19th Mar 1926 | Box 144 \ 1 scan0141 | |
| Standardisation of Wakefield's 'XL' Oil as an alternative supply to Prices oil. | 16th Mar 1926 | Box 144 \ 1 scan0142 | |
| Alternative lubricating oils, including Price's, Wakefield's XL, and Shell Super Light. | 24th Mar 1926 | Box 144 \ 1 scan0143 | |
| Selection and testing of oils for car and aero engines. | 30th Mar 1926 | Box 144 \ 1 scan0144 | |
| Shell Super R and Duckhams as potential oil suppliers for the Air Ministry. | 20th May 1926 | Box 144 \ 1 scan0145 | |
| Inquiry to Prices Co. Ltd. for a light mineral oil for hydraulic shock absorbers with a low-temperature flow point. | 20th May 1926 | Box 144 \ 1 scan0146 | |
| Letter from Price's Patent Candle Company regarding an enquiry for a light mineral oil for a hydraulic shock absorber. | 21th May 1926 | Box 144 \ 1 scan0147 | |
| Extreme stress tests on hydraulic shock dampers, comparing their durability to 'Hartford' models. | 26th May 1926 | Box 144 \ 1 scan0148 | |
| Shock absorber and damper testing, focusing on oil viscosity and axle restraint. | 26th May 1926 | Box 144 \ 1 scan0149 | |
| Shock absorber oil performance, comparing different oils and analysing ride comfort tests. | 26th May 1926 | Box 144 \ 1 scan0150 | |
| Rear shock damper arrangement, detailing tests on movement and damping. | 26th May 1926 | Box 144 \ 1 scan0151 | |
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