These changes began to close the gap in the prices of these fuels to a very small one. Some states began to rebate the gasoline tax when the fuel was used for farm purposes. Discoveries had been made during the course of World War II that allowed more gasoline to be produced from each barrel of crude oil.

While Deere had long touted the low cost of distillate fuels to increase the cost-effectiveness of its tractors, gasoline prices were beginning to come down. Gasoline’s higher octane rating allowed the compression ratios of the engine to be raised even higher, resulting in yet more power from an engine of the same displacement. This research allowed the company to produce engines providing higher compression ratios that resulted directly in more powerful and efficient engines. After decades of providing tractors that would efficiently and effectively burn cheap distillate fuels, Deere looked forward and saw that gasoline was going to be the fuel of the future.ĭeere had spent a lot of time and money researching combustion in order to provide these cost-effective engines. The first and most significant difference put into these tractors was the gasoline engine. Six experimental tractors were pulled from the “A” production line and reworked by the engineering personnel to include many of their wartime improvements. Even if they could have released these ideas as they came up with them, it wouldn’t have made much sense for Deere to do that when many of its customers were rather busy overseas.ĭirect development of the newest rendering of the model “A” began in 1945. While these upgrades were not allowed to be added to their tractors due to a War Production Board edict in 1942, Deere, and Wiman especially, knew that research needed to continue so that the company could come out strong when the war ended. As the war wore on, Deere continued to do research and engineer more upgrades for its tractor line under the directive of the president of Deere and Company, C.D. Just before the United States entered World War II, John Deere updated its model “A” with a more powerful engine, six-speed transmission and a number of other improvements.

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