Fuel Additives & Fuel Economy Abstracts - Southwest Research ...

Topic:Point of Contact:Test Objective:Vehicle:Test Procedure:Fuel Requirement:Duration:ASTM D5598 Port FuelInjector Deposit TestProcedureKevin BrunnerPhone: (210) 522-3579Fax: (210) 684-7523The objective of this test is to evaluate the tendency of agasoline to keep the port fuel injectors clean.A 1985-87 Chrysler 2.2-L turbocharged engine with anautomatic transmission is used for this test.The procedure for this test is as follows:1. PFI driving cycle:• 55 mph for 15 minutes• Engine-off soak for 45 minutes2. Flow test every 1,000 miles for 10,000 milesThe fuel requirement for this test is 500 gallons.The duration of this test is 8 weeks.Test Results: The test is a PASS if the fouling of all injectors remains 5percent or less for the entire 10,000-mile test.Note:A modified version of this test is available to evaluate thetendency of a gasoline to clean fouled port fuel injectors. Theprocedure for this test is as follows:1. For dirty-up phase, run 15/45 cycle, and flow test until atleast one injector is fouled to greater than 10 percent.2. For clean-up phase, run 15/45 cycle, and flow test every1,000 miles until fuel injector fouling is 5 percent or less.Clean-up is a PASS when the fouling of all four injectorsbecomes 5 percent or less.8SOUTHWEST RESEARCH INSTITUTESan Antonio, TexasJuly 2010