Gras 5 #1 Posted 7 hours ago Hello sorry for the stupid question in such an expert forum, but I haven't changed the oil in my C121 for 17 years, what kind of oil should I use (0W30?)? Thanks a lot Share this post Link to post Share on other sites
Achto 31,240 #2 Posted 6 hours ago (edited) 2 hours ago, Gras said: what kind of oil should I use SAE 30wt. This is what I use in all my old Kohler engines. I know it says for diesel engines. It is a close formula to what your old Kohler requires. This may be a better option in your area. https://www.q8oils.com/fr/product/q8-garden-oil-sae-30/ Edited 5 hours ago by Achto 6 Share this post Link to post Share on other sites
953 nut 64,575 #3 Posted 4 hours ago 3 hours ago, Gras said: I haven't changed the oil in my C121 for 17 years You are one lucky guy, you should go buy a lottery ticket. 2 Share this post Link to post Share on other sites
