First off, welcome to the forum and Happy New Year! My name is Mike as well and I own an 08 Suzuki Ozark 250. First I will explain the oil filter deal the best I can to you...
You will need to buy a new oil filter and oil filter O-Ring to replace the used ones.
If this link works correctly, scroll down and a big picture of the oil filter diagram will appear. Scroll down past that and you will need to order number 8: FILTER, ENGINE O and number 13: O-RING, OIL FLT.
Or if you have a Suzuki ATV dealer near you, you can go order them from there.
First-DRAIN THE OIL OUT OF THE ENGINE BEFORE DOING ANYTHING ELSE! This can be done by taking out the bolt that is screwed into the center of the bottom of the engine. You will need to get partcially under the ATV to do this. Be sure to place an oil pan under the engine . The oil pan will catch all the oil that drains from the engine.
If you sit on the ATV like you are riding, the oil filter cap will be on the right side of the engine. This oil filter cap is at the very bottom of the engine on the right side. It is even a little bit below the right side foot brake.
Once you've found it, you will notice that there are 3 very small bolts that you need a socket and socket wrench to get out. In the middle of those three small bolts is a little bit of a larger bolt, but this does not need to be taken out.
Once the 3 small bolts are taken out, the oil filter cap is now ready to be removed. Remove the filter cap slowly with an oil pan beneath the cap as oil will come out of the oil filter once the cap is taken off. Take the cap off slowly and observe how everything has to go back together.
Reaplace the O-Ring that rests in crease that goes around the oil filter cap and replace the filter, put the cap back on the way it came off, and you have successfully changed your oil filter. BEWARE: The bolts that hold the filter cap on are not all the same size. One is really long, so please be sure to put the bolts in the same holes that they came out of. Also, make sure the filter cap holes line up with the holes on the engine, this part can sometimes be tricky.
Please ask me for any help you may need because some of the things I typed may be a little bit confusing to read.
I will explain the oil type in my next reply.