welcome gcworth..... first off i miss my banshees and atv racing also. (done got too old) i did it for years. i use polaris oil, just because it comes in a nice little KIT filter and all, and im lazy like that... Low range, well trust me if you trail ride above walking speed you will not be using it. the ranger is a gas hog in low range. people will tel you that you will burn a belt and all of that crap, i never use low range unless im gona pull something really heavy (most of the time its other sxs's out of the mud) drag logs, pull cars out of a ditch ECT. for 99% of all of the trail riding and even slow around the yard and property i use high. i will use low on a really steep hill, but most of the time i just blast up it in high. if your a long time rider you can tell, if you know what i mean. just dont hit the gas hard wile the wheels are turned or on assault. the stock ranger has plenty of power and the axles are week as crap !! it will bend one in a heart beet ! oh and dont get the belt wet !! read all of the fixes on dust and squeaks! (good luck) and welcome to Polaris ranger ownership !!! LOL