Just bought a 3000 psi Troy-Bilt pressure washer with a Honda gcv 190 engine. The operator manual says to lubricate the o rings on the water hose and wand connections to help seat and properly seal them, with a "petroleum or synthetic grease". What kind of grease are they speaking of? What would you recommend that can be bought at a local auto parts store or Ace hardware? Can I just use a thin layer of motor oil like one would use for a oil filter install?