I have a Kohler 22 HP Command PRO (Horizontal Shaft) in a Ariens 931 Series tractor with 620 hours and I am going to change the oil and filter in it tomorrow. I am going to use a Purolator L35310 filter and Quaker State conventional 10W-30. I bought this oil before I joined BITOG and now I wish I got the Rotella for $2 more. Kohler reccomends 10W-30 for this engine anyway. I do not want this oil to go to waste. Would it be alright to use this oil for the rest of the season and switch it to another type of oil(Give reccomendations!) next year? Thanks!!