ler Kohler M20 and Synthetic Motor Oil

Joined
Nov 21, 2008
Messages
38
Location
Ohio, U.S.A.
My Kohler M20 Owner's Manual shows an Issue Date of 7/85 and Revised Date of 2/94. The manual says "straight 30-weight oil is preferred" above 32 degrees F and "SAE 10W-30 and 10W-40 are not recommended above 32 degrees F". Would the issue/revision dates have any impact of why there is no mention about synthetic oil?
 
Joined
Jan 25, 2008
Messages
4,452
Location
Guilford, CT
FWIW, my Kohler M12 also recommends SAE 30 but I've been using M1 10w-30 since last year and it's been running fantastic. I believe they recommended straight 30 to minimize oil consumption. If it doesn't consume much with a multi-vis oil use it. My engine oddly consumed some oil when I first switched, but after a few weeks it sort of got used to the new oil and stopped consuming oil entirely.
 
Top