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The John Deere model GP was built in five distinct versions through the course of its production: 1  The standard-front GP, or John Deere Standard, built from March 1928 to February 1935. 2  The John Deere two-wheel tricycle-front GP, or GP-tricycle, of which twenty-three units were built between August 1928 and April 1929.
Engine oil is necessary to keep the engine from seizing up. The John Deere 425 lawn tractor was manufactured between 1993 and 2001. The lawn tractor has a Kawasaki 617cc, two-cylinder gasoline engine and weighs between 800 and 900 pounds. The 425 lawn tractor uses two types of oil: engine oil and hydraulic oil.The engine oil capacity with the oil filter installed is 1.5 quarts, or 1.4 liters.he 425 lawn tractor uses two types of oil: engine oil and hydraulic oil. The engine oil capacity with the oil filter installed is 1.5 quarts, or 1.4 liters.