sparkie333 265 #26 Posted March 23, 2022 (edited) On 3/20/2022 at 7:00 PM, kpinnc said: Because newer engines have emissions systems, and the ZDDP in it buggers them up. But 30w oil with ZDDP is best suited for flathead air cooled engines. That's right all the K10hp through the K16hp are flathead air cooled engines---- right so good oil Edited March 23, 2022 by sparkie333 Share this post Link to post Share on other sites
sparkie333 265 #27 Posted March 23, 2022 Nice flathead---I use any kind of 30w Non/detergent oil ---I have 6 of these engines in garden tractors and I never have changed oil---unless I had a leaking oil shut off valve---or I put something in the engine by mistake. I bought my tractors used and they all used oil--Most of them when working the whole summer would use a qt-of oil so that was changing for me.--But I can see how the crud could build up in them. I had one that I had to pull and while it was off I drained the oil and took the oil pan off and could not find any thing that looked like crud. I do always try to keep clean air filters on them. Share this post Link to post Share on other sites
richmondred01 2,237 #28 Posted March 23, 2022 I only use non detergent oil in non internal combustion applications like air compressors. 2 Share this post Link to post Share on other sites
lynnmor 7,306 #29 Posted March 23, 2022 1 hour ago, richmondred01 said: I only use non detergent oil in non internal combustion applications like air compressors. The gear box in my DoAll saw calls for non detergent, that's the only place I use it. One of my air compressors calls for Mobil1. Share this post Link to post Share on other sites
