gud am/pm mga bossing..bought a 2nd hand 1997 starex and im thinking of having it oil change..cant decide for the type of diesel engine oil to use..i dunno the viscosity of this van coz i dont have the manual..im choosing between shell helix ultra,RP,motul or mobil 1 delvac..help naman mga genius tsikoters,tnx sa lahat..