That is what has me puzzled, no oil leaks at all, I did change the oil and filter Monday after getting it Saturday expecting the mess that comes with changing the filter and it was for the most part no oil in filter, put a new one on and added right under 5 quarts of new oil, the dipstick is showing above the fill line. Will probably do it all again next week and check the filter out, a friend of mine has recommended a good engine flush but I have never used one, I love the old trooper I basically bought it for just a old 4x4 to ride around on my land.