18 inch pounds is 1.5 foot pounds. That is very little torque. Are you sure it is not 18 foot pounds? What are you tightening that uses this torque?
YES.. 1.5 AS BOB SAIDWHY DIDNT YOU PUT THAT IN YOUR SEARCH ENGINE...HERES THE CROSS/OVERPAGE > http://www.kylesconverter.com/torque/inch--pounds-force-to-foot-- pounds-force
OH AND THATS A WET SETTING