ABSTRACT
This chapter reports the different types of oil-resistant rubber and their evaluations, by applying newly developed test methods. The rubber hoses used in the oil lines require improved performance in areas of heat aging and ozone resistance to atmospheric air, oxidized gasoline, and oxidized engine oil. Rubber hoses for fuel and engine oil lines are used by crimping with a metal fitting. The rubber materials for such hoses undergo strain under the pressure of the metal fitting. Car makers in the United States and Japan independently evaluated the sour fuel resistance of rubber parts by using the different peroxides mentioned above and others. The swelling of fluoroelastomer copolymer increases in accordance with the rise in methanol content, rendering the copolymer type unsuitable as a rubber part for cars using a flexible fuel line. Synthetic lubricants consist mainly of base fluid and additives. The types of synthetic base oil and lubricant additive were listed by Nagdi.
