---It is a common practice and suggested in the owner's manual when harsh
winters are common. There were pretty harsh winters up in Michigan, so after
finding the suggestion in the owner's manual, I didn't pay any mind to the
smell the next time I changed oil. The smell was gone after the third oil
change, so I am assuming it will take about 3 before I get all the gas out
of my crankcase. I just won't wait until 3000 miles to change oil this next
few intervals, but I do see maybe a quart of heavy synthetic added after
this next drain.
Thomas,