A couple of Quesions for you all. My Father and I have been In buisness now for about 2 years. And We have 2 riders 61' scag 27 hp, 52' scag 27 hp. My fathers the 52' is using ALOT of oil like every 3 hours 1 qt. Why could this be? And what kind of oil do you recommened? Please let me know I am a little concerned Thank you all.