Hello everyone. I know I am getting the itch for spring bad here in pa. Quick question. I have been running 10w 30 oil in my two exmarks. One has a kohler sp 27 hp and the other a kawi kai 28 hp. Someone said to run 10w 30 in the kohler and sae 30 in the kawi. Is this right or is 10w 30 ok in both? They both have about 1800 hours and I would like to make them last as long as I can. Thanks for all the help.