Sounds like you are shooting your cap gun from the hip. Do your research before you wise crack.
Rotella oil has a very high detergent content. Keeping naturally occurring abrasives in suspension is ok on diesels due to the large surface areas on the crankshaft, however on lawnmowers and other...
The anti-drain back feature in the Kohler filter is there to prevent dry start ups. Most cheap lawn mower filters don't have this feature and can cause excessive wear.
A word of caution on using Rotella sold for diesel engine use.
Rotella is a very high detergent oil and can cause excessive wear to small gasoline engines especially the ones with plastic cam lobes.