i change my own oil. It kinda sucks. I did initial dino oil change at 2000 miles, then regular dino 5w-30 every 3000k. At 11,000 miles, I upgraded to full syn schaeffers 5w-30. I have used schaefers products for a few years and am very happy with the o/a results on all the samples I sent in (indp lab). I plan on 10k life on the syn oil, changing the filter at 5k mark, changing oil and filter at 10k mark. Probly very premature, but I like to stay on the way safe side. My o/a shows I can extend my change interval to a minimum of 500 hours on my skidsteer (I still change the filter every 100 hours). When you pay more for a skidsteer that I did for my 2011 Lariat CC 4x4 EB truck, you would take very good care of it too.