Wayne0 505 #1 Posted May 22, 2023 Some where I read about using 40wt oil in a hydro to address a "slipping" issue. I can't find it. Can anyone shed some light on this? Share this post Link to post Share on other sites
Achto 27,743 #2 Posted May 22, 2023 22 minutes ago, Wayne0 said: Some where I read about using 40wt oil in a hydro to address a "slipping" issue. Most common oil used was either ATF or 10w-30. I have not heard of using 40wt. Share this post Link to post Share on other sites
lynnmor 7,352 #3 Posted May 22, 2023 10W-30 in a 520-H. I use Castrol semi-synthetic high mileage oil with good results. Share this post Link to post Share on other sites
WHX?? 49,138 #4 Posted May 22, 2023 Some where I may have heard this too but don't practice it. 10/30 syn if not atf gets my nod with no issues. If you are having slipping issues might be an underlying problem. Share this post Link to post Share on other sites
squonk 41,291 #5 Posted May 22, 2023 I use Mobil 1 10W40 in my Sunstrand hydro Share this post Link to post Share on other sites
