1994 GMC Jimmy Owner's Manual - Page 248

SHor SG "SH" or "SG7must be on the oil container, either itself or combined by with other quality designations, such "SWCD," "SH, SG, CD," as "SGKD," etc. These letters show American Petroleum Institute (API) levels of quality. SAE 5W-30 0 Energy Conserving I1 Oils with these words on the container will help you save fuel. These three things are usually included in a doughnut shaped logo (symbol) on most containers.If you cannot find oils with the "starburst" symbol, you should look for oils with thedoughnut shaped symbol, containing the three things noted above. NOTICE: If you use oils that not have either the "starburst" symbol or do an API SH or SG designation, you can cause engine damage not covered by your warranty. ~~ ~~ GM Goodwrench' oil (in Canada, GM Engine Oil) meets all the requirements for your vehicle. Engine Oil Additives Don't add anything to your Your GM dealer is ready to adviseif you oil. think something should be added. 6-12