tomtractor 71 #1 Posted August 3, 2014 When should detergent or non detergent 30 weight be used? What years? Share this post Link to post Share on other sites
squonk 38,848 #2 Posted August 3, 2014 Kohler recommends detergent oil in the K series manual. Share this post Link to post Share on other sites
Fordiesel69 206 #3 Posted August 4, 2014 Super old 1960's and older will need non detergent, unless hot tanked and rebuilt. Anything in the 70's on up can benefit with detergetn. Share this post Link to post Share on other sites
