I just got back from pulling my 19ft (about 3500lb) TT from Seattle to Minnesota and back. My truck is an 02 4X4 QC. I used about a half a quart of oil after driving about 3500 miles. Is this normal ? I usually change oil right at about 3000 miles, and havnt used any oil. This time I had to go about 4200 miles because of the trip My truck has about 35000 miles on it.