Most of you say you would not change oil in your tractor at 100 hours, but if you drove your car 100 hours at 60mph you would have 6000 miles on the oil, i bet alot would be changing oil.
The oil drain plug had a one-time-use copper washer that is supposed to be replaced every time you change the oil. It starts out rounded and flattens out when you tighten the oil pan drain plug. It costs a cool $4 and some change. And no, I don't replace it every time I change the oil, just about every other time.
Thank you! Even though I do a ton of service on my various farm equipment I hardly ever go into an auto parts store, looks like that's going to change.If it is copper go to the auto parts store near you, they all the different sizes of copper washers on hand, should be less than a dollar.