Too much oil doesn't seem to effect this motor. My Lincoln, 6 qts puts it right on the add 1.0 qt mark. I've been putting 7 qts in it since it was new. Lincoln had a 40,000 mile service agreement and Everytime I got it back it was a qt low. According to the dipstick. Once I started changing it myself, O realized it takes 7 qts to be right at kthe full mark. Been doing all along. Manual says it holds 6.