by bgsengine » Sat Apr 12, 2014 3:26 pm
You would probably want to use 5W30- The brand does not matter, it is the weight and more especially the API Service classification of the oil.
5w40 is an oil with the pour point of a 5 Wt oil, but the lubricating characteristics of a 40W oil it IS a little bit heavy under high temperature/shear loads and considering how much it would cost to REPLACE that Aegis or rebuild it, I would want to be very careful to read the owner's manual and follow the MANUFACTURER's (Kohler) Recommendations It would be foolish for any professional to recommend any thing else... even if THEY may personally feel otherwise.
How poor are they who have not patience. What wound did ever heal, but by degrees? - Iago (Othello Act II, Scene 3)