1993 Chevrolet S10 Pickup Owner's Manual - Page 253

If you're using fuelratedat 91 octaneorhigherandyoustillhearheavy if youheara little knocking,yourengineneedsservice.Butdon'tworry pinging noise whenyou'reacceleratingordrivingupahill.That'snormal,and youdon'thave to buyahigheroctane fuel to getrid of pinging.It'sthe heavy, constantknockthatmeansyouhaveaproblem. Whataboutgasolinewithblendingmaterialsthatcontainoxygen,such MTBE or alcohol? MTBE is "methyltertiary-butylether."Fuelthat fine for your vehicle. is nomorethan as 15% MTBE is Ethanol is ethylorgrainalcohol.Properly-blendedfuelthat 10% ethanol is fine for your vehicle. Methanol is methyl orwoodalcohol. is nomorethan I il -uelthat is more than 5% methanol is badforyourvehicle.Don'tuse an corrodemetal parts in your fuel systemandalsodamage plastic ma rubberparts.Thatdamagewouldn'tbecoveredunderyour Waand corrosion Znd even at 5% orless,theremustbe"cosolvent! Ireventers in this fuel to helpavoidtheseproblem! ' " Gasolines for Cleaner Air Youruseof gasolinewithdetergentadditiveswill help preventdepositsfrom forming in yourengineand fuel system.Thathelpskeepyourengine in tune andyouremissioncontrolsystemworkingproperly.It'sgoodforyourvehicle, and you'll be doing your part for cleaner air. Manygasolinesarenowblendedwithmaterials called oxygenates.General Motorsrecommendsthatyouusegasolineswiththeseblendingmaterials, so, youcanhelpclean the air, suchasMTBEandethanol.Bydoing especially in thoseparts of thecountrythathave high carbonmonoxide levels. In addition,somegasolinesuppliersarenowproducingreformulated gasolines.Thesegasolinesarespeciallydesigned to reducevehicle emissions.GeneralMotorsrecommendsthatyouusereformulatedgasoline. of the By doing so, youcanhelpcleantheair,especiallyinthoseparts countrythathavehighozonelevels. if their gasolines contain You shouldaskyourservicestationoperators detergentsandoxygenates,and if theyhavebeenreformulated to reduce vehicleemissions. 6-5