Bayrat
Silver Member
I have an old D12 that has used 10W utility oil in the gear case/hydraulic system since it has been in the family 40+ years. I was wondering if changing/mixing the viscosity with 20W would make a difference. It is not used in the winter but I have noticed more "gear noise" over the last few seasons and think perhaps a heavier weight may help /forums/images/graemlins/confused.gif