What sould I look for when buying oil?<br /><br />I was at K-mart late the other evening and they only had two brands: <br /><br />Quick Silver, 1 gallon .... $18<br />Havoline, 1 gallon ..........$7<br /><br />What's so great about Quick Silver to warrant the price difference?<br /><br />Seems as though I'm ignorant. Please inform me.<br /><br />Thanks!<br />Patrick<br /><br />'86 Force 125<br />18 ft Bayliner Capri