I drain my oil every two years....about 30kmile OCI, and the filter every 15kmiles. I take the plug out, let it drain until the drips slow down to 1 every 5 seconds, put it back in, and refill with synthetic diesel oil.

My engine will last just as long as yours, I'll spend $80 a year less on oil than you do, will pollute less, and might save your kid's life some day.

However, I won't get the sexual gratification that you get when you do your little procedure. I'm weird that way.

240Joe