RBM 12 #1 Posted 4 hours ago Hello...I want to put shell rotella t6 5w-40 in my kohler k301? I just have seen people do this before...Will this better the engines lubrication system? Is it good insurance? What are your thoughts? Thank You. Share this post Link to post Share on other sites
Darb1964 1,166 #2 Posted 3 hours ago I have used 15w-40 in some of my kohler in the summer and they seemed to do fine with it. Share this post Link to post Share on other sites
953 nut 65,119 #3 Posted 3 hours ago Your engine is splash lubricated with relatively wide clearances when compared to a modern automotive pressure lubricated engine, I would go with 30 as stated in the engine manual. 2 4 Share this post Link to post Share on other sites
clueless 3,375 #4 Posted 1 hour ago T-6 is not going to do anything better for you engine than T-1 (30w) or T-2 (40w). Full Syn and Blends in these old loose tolerance dirty port engines just burn off some of it after a couple of hours of use. Rotella T-6 is expensive overkill for these old flatheads. 2 Share this post Link to post Share on other sites
oldlineman 1,668 #5 Posted 1 hour ago I have used Rotella T1 30w for years, summer and winter without any problems. IMHO it is the best oil for these older engines that is made. Bob 4 Share this post Link to post Share on other sites
