1993 Chevrolet Suburban Owner's Manual - Page 269

If you try to do your own service work without knowing enough about it, your vehicle could be damaged. I Maintenance Schedule Section 7 ofthismanual,"ScheduledMaintenanceServices",explainsthe it shouldbedone.Italso maintenanceyournewvehicleneeds,andwhen has a form thatyoucanuse to recordthemaintenanceworkdoneonyour vehicle.Besure to readthisinformation. Fuel I K228 Useregularunleadedgasolineratedat 87 octaneorhigher. It shouldmeet specifications ASTM D4814 in the U.S. andCGSB 3.5-92 inCanada.These so youshouldnothave to add fuelsshouldhavetheproperadditives, anything to thefuel. of In the US. andCanada, it's easy to besureyougettherightkind gasoline(unleaded).You'llsee UNLEADED rightonthepump.Andonly unleaded nozzles will fit into your vehicle's filler neck. 87. If theoctane is lessthan 87, you Besurethepostedoctaneisatleast mayget aheavyknockingnoisewhenyoudrive. If it'sbadenough, it can damageyourengine. 6-4