1993 GMC Sonoma Owner's Manual - Page 261

Energy Consewing II Oilswiththesewordsonthecontainerwillhelpyousavefuel. Thisdoughnut-shapedlogo(symbol) you select the correct oil. is usedonmostoilcontainers to help You shouldlookforthisontheoilcontainer,anduse display the logo. GM Goodwrench@ oil(inCanada, for your vehicle. only those oils that GM EngineOil)meetsalltherequirements Engine Oil Additives: Don'taddanything to youroil.Your somethingshould be added. GM dealer is readytoadvise if youthink When to Change Engine Oil: See if anyoneofthese is truefor you: Mosttripsarelessthan 4 miles (6 km). are lessthan 10 miles It'sbelowfreezingoutsideandmosttrips (16 km). Theengine is at low speed mostofthetime(asindoor-to-doordelivery, or in stop-and-gotraffic). You towatraileroften. Mosttripsarethroughdustyplaces, Thevehicleisfrequentlyoperatedoff-road. If any one of these is trueforyourvehicle,you need tochangeyour filter every 3,000 miles (5000 km)or 3 months-whichevercomesfirst. oil and If noneof them aretrue,changetheoilevery 7,500 miles (12 500 km) or 12 months-whichevercomesfirst.Changethefilteratthefirst oil change and at every other oil change after that. If yourvehiclehas4-wheeldrive,you will havearemoteoil filter located underthehood. It is mounted to thefrontleftinnerfender,behindthe headlights. Engine Block Heater: An engineblockheatercanbea big help if youhavetoparkoutsideinvery coldweather, -0°F (-18°C) orcolder. If yourvehiclehasthisoption,see "EngineBlock Heater" in theIndex. 6-1 3