I don't know a lot of variables, like driving habits,etc,etc,etc,,,You need to monitor it and see just how much oil you consume!!!! As far as leaning it out of oil,,,, YES, you can turn your oil pump down BUT,,, I do not recommend it!!!!!It's not like you are trying to do 1/4 mile passes and looking for a timeslip.. the "more the merrier" is better than "not enough" oil!!!!! so it costs you a few dollars more,,, SO WHAT??????????? Remember your driving a snowmobile, the probably WORST volumetrically efficient vehicle on the planet!!!!! A VERY EXPENSIVE sport that you can only ride 5 or 6 times a winter (here in Chicago)... Another thing is you have to drive 400 miles to get O.K snow conditions,,, If your looking to save money,,, TAKE UP KNITTING A SCARF and selling them on EBAY!!!!! Gary Oles nosboy