Designation:D8275−22StandardSpecificationforGasoline-likeTestFuelforCompression-IgnitionEngines1ThisstandardisissuedunderthefixeddesignationD8275;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverstherequirementsoftestfuelssuitableforuseincertaingasolinecompression-ignitionen-ginesandvehicles,whichhavebeenspecificallydesignedtooperateonthefueldescribedinthisspecification.Thesegasoline-likefuels,whichmaycontaincertaingasolineblend-ingcomponents,arehenceforthreferredtointhisspecificationas“gasolinecompression-ignition(GCI)testfuels.”1.1.1TheGCItestfuelsdescribedbythisspecificationareonlyintendedforusebyengineandvehiclemanufacturersinthecontinuingdevelopmentofappropriatelydesignedcompression-ignitionenginesthatcantakeadvantageofcer-tainchemicalandphysicalpropertiesofGCItestfuelstoachievehigherefficiencyandloweremissions(henceforthreferredtoas“GCIengines”).TheseGCItestfuelsarenotintendedforusebythegeneralpublic.1.1.2GCIenginesincludeonlythoseenginesthatdirectlyinjectfuelintothecombustionchamber,andrelyonautoigni-tionofthefueltoinitiatecombustionpartorallthetime.Althoughvariouscombustionstrategiesmaybeuseddepend-ingonthefuelandengineoperatingcondition,theleveloffuelstratificationistypicallydecreasedinGCIenginesundercertainoperatingconditionsrelativetotraditionaldieselcompression-ignitionengines.Enginesthatuseanauxiliaryignitionsource(suchasasparkplug)somebutnotallofthetimecouldqualifyasGCIengines.1.1.3TheGCItestfuelscoveredinthisspecificationmaycontainoxygenates,suchasalcoholsandethers.Recom-mendedlimitsonthetypeandconcentrationofspecificoxygenatesareprovidedinAppendixX3.1.2ThisspecificationprovidesadescriptionofGCItestfuelsforautomotiveenginesthatarenotcurrentlywidelyavailabletothegeneralpublic,butarebeingdevelopedandrequirede...
