- Oct 13, 2001
- Upstate NY, USA
- Kubota L3710 HST and a Kubota ZD21 60Pro
I received my non detergent advice from a very old mechanic, many years ago. He restored dozens of 1928 - 1931 Model A Fords and swore modern detergent oil would eventually eat away the soft babbit bearings in these motors. I believe the 9N's are the same vintage?