Serial number 1E081216 I know the manual says 20 newton meters but I removed the plugs yesterday and found a little bit of oil on the plugs. Took a flashlight and looked into the holes in the camshaft cover where the plugs go and found a little oil in each of the 8. This engine was overfilled with oil when I got it and ran that way for 11 hours before I corrected it. Has 28 hours now. In the past I've always torqued plugs to 20 ft lbs. Think it would be ok to torque to 20 ft lbs?